Dynasty Warriors: Gundam Reborn is coming on July 4th, priced at $40. If you pre-order it you'll get extra content, but I wouldn't worry about it too much since the core game comes with 100 mobile suits by default.
The content includes the "Trial of the Crimson Red" mission, involving Char and Johnny in a new mini-storyline interlude. Also, the Beargguy mobile suit will be unlocked. You'll be able to pre-order it on the PSN on June 24th.