[Peteparker]

Notice that the first feedback of the movie don't say anything about who the villainous army is.

*EDIT*

A little bit of google digging gets the answer. Apparently a movie critic who went to the premiere spilled it in passing, not thinking about the ramifications.

I won't post the results here out of respect for those who care what the name of the alien in the movie is, and the fact that knowing it may actually 'spoil' some surprises in the film.

Heads up though, if you're trying to avoid the answer, you're going to have a rough couple of weeks ahead of you. Most likely it's going to spread pretty fast once others have done the same research.