This clip was released almost a week ago...
The story appears to commence on Thundera, as opposed to Third Earth.
I really don't have any in-depth comments on the preview clip at this point....
There are a couple of new toys for this series produced by Bandai Ent., which were showcased at the recent 2011 London Toy Fair [before the Fair hosted in New York]: http://geek-news.mtv.com/2011/02/01/new-thundercats-action-figures-bandai-toys/
OK, I do have a comment... the anime-styled artwork of the forthcoming series slightly bothers me. I expected something more "bold" or "fierce", reminiscent of the original series. Anyway, here is another fanart, my take on Liono:
More Thundercats concept artwork from my portfolio is over here:
http://dsngsfm.blogspot.com/2010/11/thundercats-remix-wip.html