Sure, there's Brawl on March 9th, but there's so other slightly less high profile stuff coming out as well:

March 18: Baroque - a macabre dungeon crawler/action RPG developed by Sting, makers of the underrated Dreamcast RPG Evolution

March 25: Okami - a port of Capcom's critically acclaimed PS2 game, possibly with updates

April 15: Castle of Shikigami 3 - a crazy Japanese shoot 'em up by Alfa System