I just found this link from Facebook and it shows the very first image of the upcoming Thundercats cartoons, this was taken from a London Toy Fair.
From the looks of it, the new series is now very anime-inspired, a big change from the classic version. There was also a Trailer in the said convention that shows the promotional ad along with interviews from the cast, it also showed the character designs of the Kittens, Snarf and Mumm-Ra, which was said were almost identical to original design.
There were no announcements of a scheduled release for the cartoons as well as a toyline release.
For comparison, here’s an image of the Thundercats from the Wildstorm comic version:
*edited: Just added another screenshot of the new Thundercats