Quite right, Mr. Dinosaur-who-wears-pink-undies. Actually, I think there was word of a live-action Thundercats, but I think that got either shut down or dismissed. As far as He-Man.... well, Dolph Lundgren played a rather "unique" He-Man and you gotta love that movie for it's originality. I do think, now that I think about it, that the He-Man franchise could use a 1 to 3 movie reboot as it has TONS of room to be a great hero story set in a dark and dreary setting.
We have the power. We have the special effects (let's just use the Lord Of The Rings team for the effects). There's no reason why it can't be done.