Stormtrooper
Championship Contender
I think it would be a great mode, and it seems like I remember having this mode in another game before, but I can't verify that and am too lazy to look it up. But it would be a great mode, depending upon how in-depth you could make it.
The best part about it is that you could finally add all the major venues that wrestling promotes at, and even the historic venues such as the Philadelphia Spectrum, the Greensboro Coliseum, hell you could even build the Impact Zone and Hammerstein Ballroom, if you so desired. The possibilities COULD be endless and fascinating.
WWF Attitude is the only WWF/E game I recall having an Create and Arena (I think the ECW games had them too. It allowed users to choose everything from the entrance way, ramp, lighting, ring apron, and even graphics on the canvas I think.
If a Create an Arena isn't the big upgrade for this year, but rather a secondary upgrade, then I'll be really happy. 2010 was their best game in forever, and a Create an Arena would add a lot of spice to the game.