Negotiations with Anthony Hopkins are in progress to allow him to play Odin, The Norse god in Thor. The movie, directed by Kenneth Branagh, in association with Marvel Studios, will follow the god of thunder, Thor, a powerful and overly arrogant warrior whose reckless actions resurrect an ancient war.
The movie will feature Chris Hemsworth as Thor and will also star Tom Hiddleston and Natalie Portman among others.
Thor is set for a 2010 shoot and a May 20, 2011 release.
Source: THR Heat Vision Blog