(Could be classed as a suggestion, but I think this is a bug.)
3* Iron Fist's Exquisite Technique - "At the beginning of every turn, if there are no friendly Attack tiles, create a strength x Green Attack tile".
3* Luke Cage's Unbreakable - "At the beginning of every turn, if there are no friendly Protect tiles, Luke creates a strength x Red Protect tile".
Of course, that's not at the beginning of your first turn. Powers like these trigger only before the opponent's first turn, for them. Yours have to wait until the beginning of your second turn to trigger.
It's never been fixed, the text has never been changed, my guess is that it's always been too hard. But now we have a newish game mechanic "At the start of the battle".
4* Rocket & Groot's Welcome to the Team - "At the start of the battle create 5 strength x Strike tiles".
It's not impossible that it's a one-off, and so couldn't be applied to a repeating power on the same colour. But enter...
4* Hulk's Grand Entrance - "At the start of the battle, destroy x random tiles. At the start of the turn, swap 1 random pair of tiles".
So, can we please have all current and future "At the beginning of every turn" powers also be set to fire "At the start of the battle".