I would like to see all the old moves readded, there is no need for THQ to take out so many every year. I want the old HHH DDT back, the multiple variations of the Powerbomb, the Widows Peak etc, all should be readded.
I want to be able to roam the backstage areas in the Hardcore matches, like in the early editions of the game. Again, with more power in the consoles, there is really no reason why this could not be added.
I want to be able to reorganise my Universe mode, choose my own number 1 contenders and reorder the rankings as I see fit.
We should be able to import CAWs from older editions of the game (or at least SDvsRaw 2011), to make it easier to build up a roster of CAWs
I want to be able to unlock old entrance music, and gimmicks for the wrestlers. For example, I would like a modern day Rock, and an Attitude era version with more hair, and I want an old school HBK and the later day one. Every wrestler should have more than 1 attire.
The time limit hardcore title match with multipl title changes needs to come back
As others have said, bring back the GM mode, or combine it with Universe mode in some way.
I could go on all day, but those are just a few of the things I would like to see.