CBM has your first (posted) look at the trailer for the new iteration of "Thundercats."
All the leaping, whooshing-backdrops, etc. won't do anything to assuage the irrational, blinding hatred some people have for Anime design-sensibilities (ironic, given that the original show's lasting-legacy is that it's animators eventually became Studio Ghibli) but in some respects it looks almost absurdly-faithful: The quick glimpse of Mumm-Ra could be a direct lift, and even Snarf seems to have made it over.
And I'll say it: "Teenage Lion-O" is an improvement. It's destined to become the poster child for fanboy bellyaching over "chickification" (his nickname will be Lion-Emo, calling it now) but one of the goofier things about the original series was that Lion-O was written as an impulsive, immature "kid" who the others were tasked with whipping into leadership-shape... but he was drawn and voiced with the same generic deep-voiced muscleman persona as every other would-be He-Man of the 80s. Assuming the premise is even somewhat close, making him look closer to 18 than 35 makes more sense. I also like that they look more like cat-people than people in bodypaint.
The real question, of course, is whether the intended audience for this - actual children far too young to remember or give a damn about an admittedly-obscure relic of the mid-80s - will actually care.