Team passives/team abilities?

WildCardCorsair

I've been thinking about it a lot, especially since we already have characters like Mr. Fantastic, 5* Cap, Ghost Rider, etc, that take into account characters' factions or alignments. So far there aren't many that do but I think it would be great if certain small bonuses existed when you use characters from certain teams. For instance if you have three Avengers on your team you can get a +5% team-up tile damage bonus or something. Could follow suit for Spider-Verse, All-New All-Diff. Avengers, West Coast Avengers, X-Men, Guardians of the Galaxy, Thunderbolts, Heroes For Hire, Sinister Six, Inhumans, etc. We have plenty at this point from each team that something like this could change how people build teams, make some characters that aren't used much viable again?

I think it's a really cool idea but what do you guys think?