I'm thinking the controls are customizable so the exact button layout may be a moot point. The default layout probably favors the 1=Special, 2=Attack. They probably don't give a button for jumping by default (where up jumps), but rather let you assign one if you so desire.
Oh and grab would be shield and attack, like it has been in the past titles. No need for tilting to roll... just shield + Left or Right
- = Taunt
+ = Pause (for single player)
Edit: They may also let you assign gestures for control (like a few default gestures - tilts and shakes) but not use any be default. There could be a whole assortment of control options for a player to pick from. ie: reverse axis, disable up for jump, remap buttons, rumble on/off, (speaker is a global thing afaik)