Source:huffingtonpost.com
"The kicker comes at the end, where fans get a glimpse at the unnamed alien race under Loki's command. Are they Decepticons? Judge for yourself in the new trailer above."
"The Avengers," starring Downey Jr., Evans, Hemsworth, Ruffalo, Jackson, Jeremy Renner, Scarlett Johansson and Tom Hiddleston assembles in theaters on May 4."