Me neither, but as far as I understood from several interviews, Sakurai is very cautious about DLC. While he first denied it, he described Mewtwo after his reveal as this so called experiment. At this point, more DLC characters might come, but Rayman is another cup and more unlikely, being not only a non-Nintendo, but also non-Japanese character.
It's good nevertheless to have a strong community that supports this character. This might play into the decision of Sakurai. So keep going, but don't trap yourselves in disappointments too much