Marvel acknowledged the leak via a meta Tweet:
John Sexton writes: After seeing the disappointing Lucy last week and wondering why anyone would think it was a good idea to take a silly premise and turn it into a profound statement, I did not want to see another summer movie with delusions of grandeur. So Friday, my family and some friends went to see Guardians of the Galaxy. Ah, now that’s more like it.
Marvel has of course been promoting Guardians heavily on TV, even highlighting the claim that it’s the “best Marvel movie ever.” Sorry but that’s not true. The Avengers and the first Iron Man are both better films. But it’s a credit to Guardians that after those two high points it at least becomes arguable whether Guardians could be next in line.
As if inviting the comparison..(more)
— NASA (@NASA) June 3, 2014