Mega Bloks has a new line coming called Kubros that includes many characters from different licenses. And the inclusion of He-Man and Skeletor is awesome!
A Castle Grayskull concept was teased by Mega Bloks at last year's SDCC so hopefully that ties into this somehow. Kubros is said to be coming soon, and we'll post more details as they become available. And check out the photos at the bottom of this article from Pixel Dan!