Persona 4 Arena Ultimax-
The first game (coming out tomorrow) is Persona 4 Arena Ultimax. This one is a must have, not only for fighting fans, but for Persona fans as well. The game itself is a sequel to Persona 4 Arena, and it features a full visual novel styled story mode taking place after the events of the original game (and before the Golden ending in Persona 4 Golden). On top of that, the game features brand new gameplay modes, new characters, shadow versions of the characters (both new and old) with different move sets, massive online lobbies (PS3 version only), and other general gameplay updates you might expect from a fighter.
While the game is a part of the Persona series and aimed at fans in general, it is still a solid fighter just about anyone can enjoy. Even if you aren't a Persona fan, but enjoy fighters by Arc System Works (Guilty Gear, BlazBlue, etc), then it may be worth checking out.
Super Smash Bros 3DS -
This is the big one. After a long (LONG) wait, Super Smash Bros for the 3DS finally hits western shores. Since the release of the original back on the N64, the Smash Bros series has been one of the most well known games among gamers, and a must have for Nintendo fans. Featuring a wide range of characters from a wide verity of game series, Smash Bros is a game both casual and competitive players can enjoy, and now the full experience can be found on a handheld for the very first time. Of course a full HD release will be coming to the Wii U later this year, but for now those itching to play on the big screen will just have to settle for the 3DS.
While at their heart both versions of Smash Bros are the same game, the 3DS version and Wii U version do have their own gameplay modes and stages to play on, so you do get a bit of a different experience depending on your console of choice. (Which gives you a reason to pick up both versions if you can.)
So, if you're into fighting games, or love crossovers--get ready to play some great games this week! Rather it be Persona 4 Arena Ultimax, or Smash Bros 3DS (or both), don't forget to mark the date on your calender because the wait is almost over.