Community AU project: The main hurdles don't exist for each game

Recenlty I've seen a lot of people make a bunch of alternate rosters regarding what if scenarios (mostly down to what the community would do if they were in charge of the rosters) but I wanted to do something a little different because, unlike most games, we have complete tangibility as to why certain characters got cut and certain decisions got made for each and every game so I was thinking, Why not make AUs for the game to not just change the roster but to change any potential modes that exist with it. Here are the scenarios

What if Smash 64 was always a Nintendo crossover?

What if Melee had a regular development schedule?

What if Brawl didn't have Subspace Emissary?

What if 4 was only on the Wii U?

What if Ultimate wasn't about bringing everyone back?

And on top of that. I want YOUR inputs for all of these, that way I could get feedback on more than just characters. What do y'all think, is this something you'd be interested in?