For me it’s a tough one, given the history of great titles Xbox and their studios have, but if I have to choose just a couple:
Edit: Fixed my horrible phone formatting 
Tier 1. Banjo / Ninja Gaiden
Tier 2. Perfect Dark
Tier 3. Viva Pinata
other stuff that that I think makes sense to return. Fuzion Frenzy with Xbox characters as mentioned. I’d also love a Kart Racer with Xbox Characters. 1 v 100 absolutely should be there at launch.
Otogi
Lost Odyssey
Project Gotham Racing
Kameo
Condemned
Jade Empire
Star Wars K.O.T.O.R
Jet Set Radio
Viva Piñata
Ninja Gaiden / Shinobi
Viva Pinata would be perfect. I’m still shocked that haven’t done more with it.
I genuinely believe they should give Remedy a briefcase full of money to make Alan Wake 2. They are so talented it’s insane they are still independent.
Yes, I don’t care how much money it takes…give me Alan Wake 2 please!
Also, would love to see a new Jet Set Radio, and while it’ll never happen, I have a soft spot for Sudeki.
Posting it again here…
What do you think about Scalebound guys?
Because I saw that article today with Platinum Games studios members interviewed…
Kamiya seems open to work on it again if there is a chance given
Like I said earlier imho MS should take the opportunity to bring it back for next gen only.
I agree, we were promised this game several years ago, and I would still like to play it. If not get with Cliffy B. And give us a dragon game with some of his artwork and ideas from his concept Dragon Flies.
Banjo!
It’s shocking how Ubisoft is cheapening such a strong character and fantastic genre.
Can’t revive something that never lived. 
Lol technically since it was in dev, it was alive.
Nope…it was being built, it never LIVED! 
Lol You made a point. Guess we can change the term revive then with another haha
Damn so many IP that Microsoft could use 
Mechassault and everything Mechwarrior/Battletech they own : As much as I like the actual Mechwarrior (shooter) and Battletech (tactical strategy) games, or the old Mechassault (shooter) game, I think they could extend on that. Imagine some Action RPG ala Mass Effect with action part when you pilot a Mecha. Or some grand strategy games ala Paradox, something between Stellaris and Crusader Kings, with a bit of Age of Wonders planetfall. Maybe a shooter but in the same form as Halo Infinite : F2P multi, semi-open world solo with updated content (new mission, events, etc…).
Shadowrun :
Ok, I know, it smells the FASA fanboy 
A triple A Shadowrun game, come on!!! FPS/RPG ala Deus Ex or Cyberpunk.
Lost Odyssey I think it gonna be hard to make Takehiko Inoue work on the character design on a follow up but hey, we can dream.
Ninja Gaiden : Acquire a japanese studio or create a new one, and let them do a relaunch of Ninja Gaiden.
Perfect Dark A reboot with a lot of lifting on the story. The aliens didn’t aged well to be true.
Last generation iterations Killer Instinct, Ryse, Recore, Quantum Break. With more time for developpement and gamepass to give them a space to perform well.
Kids games : A Viva Pinata revival a bit like Animal Crossing, and some plateformer like Banjo. Actually it’s kinda like if MS and Sony had given up on this type of game. Ok they can’t compete with Nintendo, but gamers have sons too 
Ninja gaiden would be great but i guess that is not up to MS.
Crimson Skies. I really enjoyed that game. Maybe use whatever engine Flight Simulator is using or something similar. It may not be as good looking because the game would have more going on though with all the guns and missiles being shot. Still it could be a looker.
If I had to pick 5 from the enormous catalog. Give me.
Scalebound was the biggest Platinum games project at the time. They suddenly had the resources to push out more games then ever. I believe the rumour about using some of Microsoft budget/assets to develope other projects are true. For me it’s a no.
They also skipped a Wonderful 101 Xbox release because of the engine lol
I would love to have a new Sudeki and Black and White. I don’t know if EA or MS have the rights of the IP.
This would be awesome I had too much fun on fusion frenzy back on og xbox