Platinum games and Metal Gear Rising producer Atsushi Inaba, has clarified on Twitter that PS3 is the lead platform for MGR: Revengance.
According to Andriasang, the studio wants to avoid the mistakes made with action game Bayonetta, since that version was developed externally and suffered as a result.
Platinum Games was the developer of both Bayonetta and Vanquish. The latter was developed with PS3 as the lead console, although Bayonetta was outsourced, leading to the PS3 version being weaker as a result.
So expect no compromises on either version, which we suppose is the way it should be.