The Vita version of Rayman Legends shipped missing Invasion levels found in the other versions. However, a new update will restore these levels. The update is coming November 26, and will also introduce leaderboards.
Ubisoft announced the date on Twitter. We had heard before that the Invasion stages would be coming via a free patch, but that was way back in early September just after the Vita version launched. Almost three months later, it will have parity with the highly regarded console versions.