Ok, so I have a nice, fun list for this already in my head!
1. Halo 5--Give us a new Halo where the multiplayer won't die after 6 months. I read an article yesterday about how a year after they launched, Halo 3 and Reach were at 1.1 million and 900,000 players per day, respectively. A year after ITS launch, Halo 4 struggles for 20,000 players in a day. Following the Killzone model and giving maps out for free woudl be a great start, IMO. It might also mean dialing back the Call of Duty stuff, like the Ordinance and Perks, which I wouldn't mind (they don't bother me, either). Just get the multiplayer back to sustainability.
2. Kinect Disney World Adventures--I don't own a Kinect, but my little brothers do. I don't ever go over there and play it, but I DID play Disneyland Adventures once. The first-gen Kinect was a nightmare, btu the new one would make this playable and fun, and the new hardware means we HAVE to go bigger. I want to play Kinect-style mini-games for Test Track (my grandma's favorite ride; she'd flip out), Soarin', Tower of Terror, and all of that would be the BEST. Seriously, do this. Hard.
3. Viva Pinata--If you don't like that original game (never played the sequels), you didn't play it. I loved that game, it was so much fun, and I'd enjoy a TRUE follow-up (same play style and all) immensely.
4. Roller Coaster Tycoon--I've never played Zoo Tycoon, but it looks cool, and I'll bet Kinect helps it out quite a bit. This means RCT needs to follow, because we haven't had a new one in years.
5. Defiance--I really like this game, but it gets badly ruined by current-gen hardware. The consoles can't handle more than a few players in an area, so anything in double digits basically means that every model but yours is reverted to a default one to make the game work. That, and when you're in an Arkfall (think of it like a single-boss WoW raid), the lag is unbearably bad. This game should have been saved for next-gen, but they needed it out for the launch of the show, and they need a next-gen refresh to come out for season 3, since it's unlikely to hit for season 2.
6. Music Games--Bring them back. I miss them. Don't bring them back every 6 months, though. Treat it like Rock Band 3, giving up a game that lasts 3-5 years but has loads of DLC.
7. Kingdom Hearts Ultimate Remix--I have a major love-hate relationship with Kingdom Hearts. As I said, I love Disney, so I love that franchise for its Disney-infused goodness. However, I abhor that they throw the story over about 5 different platforms (PS2, PS3, GBA, DS/3DS, mobile). With the announcement that KH3 is hitting the Xbox One, I need a way to get my story straight. I have only beaten the original and Chain of Memories on the GBA, simply because I have no DS/3DS, no PS2, no PS3, and the mobile game's not on Windows Phone. This means I can't get KH3 without catching up, and they are HIGH AS A KITE if they think I am going to go buy a PS3 (the old, backwards-compatible one), a 3DS, and a mobile device to figure out the story. So, if they want my business, let me throw money at them for an Xbox One Remix collection, like they have done on the PS3 a couple of times now.
I could keep going on games, but I'll wrap up with this, as I have to leave
8. Shootertar--Make the Forza Drivatar feature (where AI cars drive based on real players' habits) have a comparable feature on shooters. I'd rather NOT have the marines in Halo 5 be idiots. Have them learn from my friends and play the campaign intelligently with me. If you want a killer selling point for your consoles Sony can't touch, there you go. Leverage that cloud crap up and down the street.