2D side-scroller rolls out a few days early.
Expect the disappearing heavy weapon ammunition bug to be fixed by the end of February.
Upcoming games not affected, SEGA says.
Decision will let players "live out some of their most memorable Star Wars battle fantasies".
All are designed for the game's 8-player Smash mode.
Endor, storm troopers and AT-STs revealed in first artwork.
£8.99 gets you the acclaimed Wii game, re-released for Wii U.