Cat Planet Cuties Season Two FTW!
It ain't gonna happen.
I think it has a better chance than Freezing getting a second season. Cat Planet Cuties had pretty strong video sales in Japan. The only thing that was anchoring it down was the source material (ie not enough available). However, you're right. The chances of another season is pretty slim now. It's pretty rare to see a title getting a second season after so much time has past since the first season.
As the old saying goes, "you strike when the plate is hot."
Just look at High School DxD. Just a few weeks after the final volume (BD/DVD) released out in Japan, season 2 was announced.