I was wondering if they were going to do such a thing with the Mario like that. I mean people bitch that a Mario game is just "Save the Princess, get a cake, hurk" and when Nintendo deviates from that norm people want to return to what it was.
I like the deviation, because I really would think a game that starred Princess Peach would be fantastic if I'm thinking what Miyamoto's thinking. Like say, Bowser kidnaps Peach, and then for some reason Mario's not showing up. Boswer, being impatient, decides to take the fight to Mario this time and abandons his castle. And Peach escapes, because well... that's what the game would be.
I see two distinct possibilities for a game like this. Possibly a 3-D/2-D/2.5D Platformer in which you do the levels of a usual Mario game in reverse. They could either make you do the usual increasing difficulty in which the only difference is that you are moving right to left (2D style) or just doing going backwards through 3D representations of the levels from, say Super Mario Brothers 1.
The other possibility is Nintendo doing their classic "let's take unfun genres that have stagnated and make it appeal to people who like gameplay" like they do with RPG's every now and then. Imagine Peach having to sneak out of Bowser's Castle. A stealth game could be done very well as long as they ignore two precedents. Splinter Cell, with it's "OMG they found a footprint you made at the beginning of the level. Please Restart." And Sly Cooper AKA the most boring platformer, ever.
Either possibility is fine, and I believe I am very correct in saying EAD (if my speculation is right) has done weirder games before that turn out to be classics and have elements quickly emulated. And I also believe EAD has never ever made a bad game, and I am including Luigi's Mansion. Haters.
But really, I would like to hear what people already think of the game when they only know the title. It's so insightful.