I hope their will be some support for this in dlc just wondering how much their would be...i havnt heard anything on extra content as of yet

id Software said they would consider the DLC based on what fans want. So the possibility of doing DLC is on the table, we just need to let them know what we would like.

Even though I haven't tried the co-op integrated with Rage, I'd also like to see a co-op mode for the main campaign. Regarding other content, I'll have to play the game and see what I like