Those levels have been found and they'll be landing soon.
Ubisoft has revealed via Twitter that the levels that didn't get into Rayman Legends for the PlayStation Vita are coming on November 26. These Invasion levels weren't part of the initial game launch back in September, for some reason.
The publisher also revealed that leaderboards are coming to the Vita iteration, so you can compare your platforming skills to those of others. Remember, this is one of the more challenging games you can ever play, so any gamers sitting atop the leaderboards have definite skillz . If you're into platformers that require some time and dedication, Rayman has always delivered the goods.
Legends is also headed to the PlayStation 4 and Xbox One in February 2014. Gettin' it for next-gen?
Related Game(s): Rayman Legends