There's a lot I want from Halo: Infinite and I have faith that 343 will deliver a great game.
1. Great multiplayer maps (new and some old classics)
2. No forged maps in rotation unless there's a community week featuring some maps.
3. 4k/60fps (or higher)
4. Keep Halo 5's multiplayer, IMO 343 nailed it with MP (besides the maps, they could've been better)
5. Halo 5 style Forge Day 1 with file sharing/custom browser. (Include a updated Forge Island from Reach with a high budget)..
6. Daily/Weekly/Monthly objectives/bounties + clans
7. REQ system can stay for cosmetics, but basic perma unlocks should be available by simply leveling up. (DMR, BR, etc)
8. Halo Reach customization system
9. Firefight
10. A mind blowing campaign focused on Master Chief
11. Unlock armor by completing certain achievements in Halo MCC. They did this with Halo 5 (Beat all campaigns in Legendary to get an armor set, I'd love for them to do it again with other achievements or finishing certain objectives.
Unrealistic stuff that I'd wish for
1. A Halo variation of Destiny's Gambit
2. Re-make every single MP map made for each game.
3. Mod support
It also needs insane eye melting graphics. Halo hasn't impressed graphically since the original.
Did you play Halo 4? Considering it was developed for the Xbox 360, that game looked really good. Also, Halo 2: Anniversary in 4k looks insane.
Halo 4 (360 version)
and you can check out this thread for Halo 2: Anniversary screenshots