Checking Ben 10's Facebook, i found:
Congratulations, Ben 10 Fans! You won the Race to a Million Fans! As a reward and thank you for being such great Ben 10 fanatics, we risked life and limb to smuggle this exclusive behind the scenes peek at ChamAlien, a BRAND NEW, NEVER-BEFORE-SEEN ALIEN, from Cartoon Network Studios! Thanks, Ben 10 fans, you’re a million of the awesomest people EVER, and look for ChamAlien in a new episode soon!!
This is the Alien