Hmm, let me think...(I know you didn't mention games, but this is what I want!)
1: A sequel to Banjo & Kazooie: Nuts & Bolts that pushes everything to 11, or at least a PC port with modding, people have no idea what they missed with the first games genius, but I understand we should've and still should get a true Banjo Threeie.
2: I'd also love to see a spiritual sequel to Diddy Kong Racing by Rare or Playtonic (or possibly Sumo, if it's their A-Team, not the B-Team that made TSR), again for PC and other platforms.
3: A true remake of Halo CE made by Blue Point Games, the remaster is an abomination!
4: Forge 2.0 in Halo Infinite, basically let you add bots for mp, the kind of flexibility whereby you could create almost any gametype you could imagine and (this is the big one) even create you own sp and co-op campaign missions!
4: Make an open world Sonic game that essentially looks like the Sonic CD intro.
5: A sequel to Exhumed/Powerslave, or more fps' that are metroidvania (Doom Eternal was a great step in that direction).
6: Christian games that don't suck, there's so much to draw from there, so much untapped potential...
7: More future sports games like Windjammers.
8: A resurgence of arcade racers, Forza Horizon isn't nearly arcadey enough, not even close, think super exaggerated Michael Bay craziness!
9: More Synthwave/Retrowave in games, in fact, more games built around that whole movement that aren't rubbish...
There's a lot more, but I'll leave it there...