Just bought Phantom Breaker: BattleGrounds on XBLA... holy shit, this came out of nowhere for me!
Fantastic beat em' up in the same vein as Scott Pilgrim, Guardian Heroes and Code of Princess.
Fighting take place on 2 planes (similar to Guardian Heroes), and the character cast is all female, designed in the same style as Scott Pilgrim. Animation, enemies and gameplay is seriously amazing - might be some of the best in the genre.
I believe some devs from the original Guardian Hero team worked on the game - and it shows.
There's a demo up on XBLA - go check it out if you like awesome.
More info at NeoGAF:
http://www.neogaf.com/forum/showthread.php?t=514402