Jump Festa 2011 company line-ups thus far

SEGA

Phantasy Star Portable 2
Shining Hearts

CAPCOM

Monster Hunter Portable 3rd
Marvel vs Capcom 3

TECMO KOEI

Ishin no Arashi Shippuu Ryoumaden
The page also says “Perhaps you’ll get to also play that new game that you’ve been waiting for.”

SONY COMPUTER ENTERTAINMENT

Bleach Heat the Soul 7

SQUARE ENIX

Videos of the latest games in a Mega Theater, new game demos

TAKARA TOMY

Naruto Shippuuden Gekitou Ninja Taisen! Special

NINTENDO

Latest Wii and DS titles

HUDSON

Party Game Box 100 (Wii)

NAMCO BANDAI GAMES

One Piece Gigant Battle (DS)
Naruto Ultimate Ninja 2 (PS3/X360)

Source