I have high hopes Marvel will get Thanos right. Probably a proper introduction in Thor 3, with decent amount of cameos in Phase 3 movies, then he's an all out badass in Avengers 3.
Thanos has been built up to more than a one & done villain.
I hated his look in Guardians it was like they went halfway with Thanos looking like Josh Brolin. It looked cheap. This new look is even more humanoid, so at least it doesn't look like a half-step.