Not only does it feature the Guardians of the Galaxy,the episode is called Michael Korvac.
Star of a classic Avengers storyline which I just re-read not even knowing of this. Seek it out people. Interesting note though that the story featured the 30th Century Guardians and Starhawk is integral to it so methinks it won't be an adaptation.
Has always watch it! Tell everyone you know to watch it! Write Marvel Animation and Disney XD and tell them not to cancel this for a Ultimate Show.