Hot Rumor! Who Are the Villains in The Avengers movie?

Rumor on the geek street is the Skrulls and Loki are the villains in The Avengers film.
Over at AICN, Harry had this to say:

I got word that MARVEL has shot a specific teaser trailer for THE AVENGERS - and that LOKI is featured in that teaser trailer.   Makes total sense.   I imagine that will either be on THOR or CAP...  or Both if they're smart...   But then...  our buddies over at LATINO REVIEW - Kellvin says that he's learned that Joss Whedon is going to be having Loki bring in The Skrulls.   

So - Let's see if I have this straight.   In like a year's time...   The man that gave us SERENITY - is going to bring a cosmic SKRULLian smackdown to Earth being fought off by the AVENGERS?   Jesus, we live in blessed times.   I mean, MARVEL is getting science fiction and fantasy...   This just delights me to no end.   I mean, this is amazing.   We're going to have things we never thought we'd see.   And I'll be walking into theater to see it!   Fucking Cool!

It is Fraking cool, if this completely true. I talked about this before. The Skrulls were the topic of discussion then, so I wonder if this will be the plot line? I guess we will see.