Yes, they’ve changed the name for the benefit of UK audiences. Apparently keeping the original title The Avengers would cause much confusion throughout Great Britain, with many people so puzzled that this film wasn’t about John Steed or a lycra clad Emma Peel, that they’d be forced to put down their china tea cups.
This official trailer gives you a look at Joss Whedon’s vision of a modern day take on the super hero alliance of The Avengers, starring Robert Downey Jnr as Iron Man, Chris Evans as Captain America, Mark Ruffalo as The Incredible Hulk, Scarlett Johansson as Black Widow, Chris Hemsworth as Thor and Jeremy Renner as Hawkeye. The plot rattles along like so:
Pew, pew, pew, zooooom, baaabaaabooooomm, thwunk, bang, bang, bang clank, click, puh-puh-puh, gazooks, tch, tch, tch.