Gradius V, a shmup classic that was released in 2004 for the PlayStation 2, has been rated by the ESRB for release on the PlayStation 3 via the PlayStation Network, in a spotting by NeoGAF.
The game was developed by shmup titans G.Rev and Treasure and published by Konami and set a new benchmark for the series as a whole.
In the meantime, if you want to get some Gradius action on a more recent platform, the Gradius Collection, which contains the four previous games, is playable on Vita.