Check out the first trailer for the 90 minute epilogue to the Transformers Prime series! The Autobots, Decepticons and Predacons Unite against a resurrected Megatron now under the control of Unicron, who seeks vengeance on Cbertron and all it's inhabitants.
The movie will air on the Hub this fall....no firm date is set yet but it will be on Blu ray 10/1/13 and DVD 10/8/13, so I would assume it'll be on TV before that.
Oh is that Galvatron I see at 00:21???? Me thinks it is!