Based on a recent famitsu article, the upgrade version for Rev 2 will cost 2000 yen (roughly $20), Baiken has air guard cancels now, they have been somewhat simplified but her other moves are still there, the old chars will get tweaks and rebalances, some getting new moves like Ramlethal, also the story chapter added will be big but not as big as that of the base game.
Answer plays in a speed based rushdown style, can throw business cards like shuriken and teleport to them or hit you with a clone, he can set scrolls in the air and use them to do moves off of them like an air-stance. Lots of complex ninjaish stuff, which is exactly the kinda thing I like as a Bang player.