After some discussion about what fivestar characters were featured in special stores I realized a master list could come in handy. So I decided to make one. As far as I can tell it started with the Cosmic Legendary store and Daredevil's release, so that's where I am starting.
Hornhead (Daredevil release) - August 24th 2017 - Daredevil, Black Panther, Peter Parker -
Cosmic Legendary Store - September 20th 2017 - Silver Surfer, Star-Lord, Thanos -
Mes Amis (Gambit release) - October 5th 2017 - Gambit, Phoenix, Old Man Logan -
Fan Favorite (Anniversary 4) - October 5th 2017 - Black Bolt, Black Panther, Black Widow, Doctor Strange, Phoenix, Silver Surfer, Thanos, Old Man Logan -
Sakaar Arena (Thor release) - October 27th 2017 - Thor, Dr Strange, Hulk (0,2% fivestar pull rate, tokens not purchaseable) -
Friends from Work (Thor release) - November 5th 2017 - Thor, Dr Strange, Hulk -
Avengers Assemble - December 8th 2017 - Iron Man, Black Widow, Hawkeye, tokens not purchaseable -
Angel of Death (Archangel release) - December 14th 2017 - Archangel, BiB Spiderman, Thanos -
Family Legends - December 14th 2017 - Black Bolt, Black Panther, Phoenix -
Engines of Vengeance (Ghost Rider release) - January 25th 2018 - Ghost Rider, Daredevil, Doc Ock -
Alias Investigations (Jessica Jones release) - March 8th, 2018 - Jessica Jones, Black Panther, Green Goblin -
Covert Ops (LumberCap release) - April 19th, 2018 - Captain America (Infinity War), Black Widow, Hawkeye -
Don't Freeze (Okoye release) - May 17th, 2018 - Okoye, Black Panther, Peter Parker -
Women Warriors (Wasp release) - June 28th, 2018 - Wasp, Okoye, Jessica Jones -
Right to rule (Loki release) - August 9th, 2018 - Loki, Thor, Black Bolt - https://forums.d3go.com/discussion/74493/loki-god-of-mischief-8-7-18
Xavier's Finest (Kitty Pryde release) - September 20th, 2018 - Kitty Pryde, Old Man Logan, Phoenix - https://forums.d3go.com/discussion/75159/kitty-pryde-uncanny-x-men-9-17-18
Fan Favorite 2 (Anniversary 5) - October 4th 2018 - Old Man Logan, Dr Strange, Jessica Jones - https://forums.d3go.com/discussion/75371/mpq-5th-anniversary-celebration-updated-10-8-18#latest
Mutant Mavericks (Cable release) - October 18th, 2018 - Cable, Gambit, Archangel - https://forums.d3go.com/discussion/75558/cable-nathan-summers-10-12-18#latest
Big Bads (Kingpin release) - December 13th, 2018 - Kingpin, Thanos, Doc Ock - https://forums.d3go.com/discussion/76467/kingpin-spider-verse-12-10-18#latest
Family Legends 2 - December 21st, 2018 - Thor, Black Bolt, Old Man Logan - https://forums.d3go.com/discussion/76470/mpq-winter-holidays-celebration-updated-12-31-18#latest
Dangerous Doctors (Doom release) - January 17th, 2019 - Doom, Dr Strange, Hulk - https://forums.d3go.com/discussion/76884/doctor-doom-god-emperor-1-14-19#latest
Masked Vengeance - January 21st, 2019 - Green Goblin, Ghost Rider, Spider-man (Back in Black) - https://forums.d3go.com/discussion/76962/red-goblin-bundle-1-21-19#latest
Favorite Legends - February 19th, 2019 - Thor, Okoye, Kitty Pryde - https://forums.d3go.com/discussion/77367/favorite-legends-store-2-19-19
Presumably more to come... Let me know if I missed any.
Counting how many times each fivestar has been featured:
Silver Surfer: Cosmic Legendary, Fan Favorite 1 - 2
Old Man Logan: Mes Amis, Fan Favorite 1, Xavier's Finest, Fan Favorite 2, Family Legends 2 - 5
Phoenix: Mes Amis, Fan Favorite 1, Family Legends, Xavier's Finest - 4
BiB Spiderman: Angel of Death, Masked Vengeance - 2
Green Goblin: Alias Investigations, Masked Vengeance - 2
Iron Man: Avengers Assemble - 1
Captain America (Civil War): None - 0
Bruce Banner: Sakaar Arena, Friends from Work, Dangerous Doctors - 2½ (do Arena and Friends count as 2 or 1)?
Black Bolt: Fan Favorite 1, Family Legends, Right to Rule, Family Legends 2 - 4
Black Widow: Fan Favorite 1, Avengers Assemble, Covert Ops - 3
Dr Strange: Fan Favorite 1, Sakaar Arena, Friends from Work, Fan favorite 2, Dangerous Doctors - 4½ (two more than Banner however you Count)
Thanos: Cosmic, Fan Favorite 1, Angel of Death, Big Bads - 4
Black Panther: Hornhead, Fan Favorite 1, Family Legends, Alias Investigations, Don't Freeze - 5
Hawkeye: Avengers Assemble, Covert Ops - 2
Star-Lord: Cosmic - 1
Doc Ock: Engines of Vengeance, Big Bads - 2
Peter Parker: Hornhead, Don't Freeze - 2
Daredevil: Hornhead, Engines of Vengeance - 2
Gambit: Mes Amis, Mutant Mavericks - 2
Thor: Sakaar Arena, Friends from Work, Right to rule, Family Legends 2, Favorite Legends - 4½ (two more than Banner, same as Strange)
Archangel: Angel of Death, Mutant Mavericks - 2
Ghost Rider: Engines of Vengeance, Masked Vengeance - 2
Jessica Jones: Alias Investigations, Women Warriors, Fan Favorite 2 - 3
Captain America (Infinity War): Covert Ops - 1
Okoye: Don't Freeze, Women Warriors, Favorite Legends - 3
Wasp: Women Warriors - 1
Loki: Right to Rule - 1
Kitty Pryde: Xavier's Finest, Favorite Legends - 2
Cable: Mutant Mavericks - 1
Kingpin: Big Bads - 1
Doom: Dangerous Doctors - 1
I could be mis-remembering but was there not a special Civil War vault on the first run - I'm thinking there was a Cap and IM one and the price was 30CP?
I Think the very first run flat-out gave out Cap and Iron Man covers as the round 8 reward. But later runs adjusted it so it was just tokens. I focused on only the tokens that have had multiple fivestar characters available though, I suppose I could make a list of all the single-fivestar vaults that have run, but I don't know how useful that information would be.
I will look into it though and see if I can dig anything up.
Found some info!
In the first run, Civil War had two different vaults, one with a 10% chance for Captain America and one with a 10% chance for Iron Man. Tokens cost 30CP. https://forums.d3go.com/discussion/43525/civil-war-details-part-ii
In the second run, covers for Cap and Iron Man was handed out as round 8 rewards. I don't Think there was a vault then as they were in Latest Legends already at that time. https://forums.d3go.com/discussion/44690/civil-war-run-2-details.
The third run was the release event for Black Widow, so it awarded Red Room tokens that had a 10% chance for Black Widow covers. https://forums.d3go.com/discussion/50072/civil-war-returns-new-event-details-updated
Found some info!In the first run, Civil War had two different vaults, one with a 10% chance for Captain America and one with a 10% chance for Iron Man. Tokens cost 30CP. https://forums.d3go.com/discussion/43525/civil-war-details-part-iiIn the second run, covers for Cap and Iron Man was handed out as round 8 rewards. I don't Think there was a vault then as they were in Latest Legends already at that time. https://forums.d3go.com/discussion/44690/civil-war-run-2-details.The third run was the release event for Black Widow, so it awarded Red Room tokens that had a 10% chance for Black Widow covers. https://forums.d3go.com/discussion/50072/civil-war-returns-new-event-details-updated