Last seen in 2004 on the PlayStation 2, Gradius really needs no introduction to most gamers, as it's one of the most popular shoot 'em up series of all time, due to being one of the first to be established, and featuring a unique gameplay system that lets you upgrade your ship in a variety of ways as you go along.
Of course, this will be included in this game as well. You will once again take control of the Vic Viper and battle enemies such as Moai heads to take down the Bacterian Empire. From the single screenshot Konami has released so far, the game seems to resemble the first installments in the series, so Konami obviously seems to be going for a retro look, much like Capcom with Mega Man 9! The game is currently slated for a summer 2008 release in Japan, and has not yet been announced for release elsewhere (yet!).
Source: Gradius Rebirth official site