Prince of Persia: Rival Blades was submitted as a multiplatform action game with an Australian Mature rating. But Ubisoft mentions to Futuregamez it wasn’t the real title and clarified by saying:
“It was an alternate title for Prince of Persia: Two Thrones at one stage. We’re flagging a DS version coming out in the future. Thus the lower rating.”
Prince of Persia: Revelations on PSP also was a tweaked version of the console game Prince of Persia: Warrior Within, and in the case of the DS PoP it’s getting a tweaked version of The Two Thrones.
Joystiq clarifies that Ubisoft is working on a new Prince of Persia title for the Nintendo DS, but it doesn’t appear to be another card battler like last year’s Battles of Prince of Persia.