All of nicethugbert's points plus
- Standalone Multiplayer so I don't have to install 15GB of singleplayer crap I don't even play
- Maybe Free 2 Play model als long as pricing is right and everything can be unlocked without money as well
- Coop story mission instead of just horde mode
- A lot of customization options like in Blacklight Retribution
- Awesome Space Ninja moves and skills like in Warframe
- Beautiful HD graphics for PC players like Crysis 3
- Extensive beta testing before official launch
- Maybe some possibilities to mod the game and submit mods
- New content on a regular basis, like new coop missions, gear, weapons, kits...
- Maybe even a separated PvP mode (with more limitations than PvE to keep it balanced)
Probably I can think of much more if I really go into full brainstorm mode