They did a WWE 13 Q&A on youtube, but I figure people would just want to know the quick version
Features Attitude Era, but it's still a modern WWE game. That's still the main focus.
Single player campaign is 'all about the Attitude era', so that's probably why RWM has been replaced in favor of this Attitude Era campaign. So the modern equivalent will probably be less 'story focused'.
Atitude Era campaign is not 'going to be rated r but not going to be rated pg either'
Austin's middle fingers are in, but they're blurred (WHICH IS AWESOME TO ME. That makes it extra hardcore and authentic from the old WWF replays)
Blood is turned off, but in the atittude era campaign, you'll get a 'different experience' if you turn it on and he claims 'different scenes'. (Which I'm just going to assume means that Austin is bloody in a cutscene instead or something)
No WCW Arenas
The meter for pinning is changed to being based on damage and the move before the pin. So if you hit an arm drag and pin, your opponent will have a bigger bar to kick out of. If you hit a stunner or a big move, it'll be smaller.
AI is more aggressive with pinning
'Big moves' will keep an opponent down on the ground longer than regular moves, regardless of what their damage is at. (No no selling finishers, ladder moves, etc.)
You can hit midair finishers off springboard(like Jericho's codebreaker from a diving opponent)
You can set infinite finishers in match settings if you want
Improving hit detection has been a 'big focus' this year. Mostly springboard and diving attacks
New contextual animations? He was saying if you normally did a clothesline to someone's back in previous WWE games, you'd just sort of have weird stuff happen and the characters would kind of stumble. Now, if the opponent's back is to you, you'll do a dropkick or something similar instead, and they'll animate with that
You can't do lifting moves to opponents that drastically outsize you, but you won't do the 'oh my back' thing either. Your character will just go for a different move, and you can sub in whatever you want that different move to be on your Create A Moveset