Just got back from watching the movie. I can highly recommend it, it is very long (hobbit length, movie started 20:30 and ended around 23:00).
NO SPOILERS IMPRESSION: A lot of character development throughout the movie with a heavy and long finale (I don't know, maybe around 30-40 minutes. much much longer than the lizard fight in TASM1). A lot of twists too.
On the other hand I don't know how Beenox can follow the movie without giving stuff away. I expect them to spoil certain things so play at your own risk, there's stuff you wont really see coming that they could potentially spoil in the game.
//EDIT: XBox One version is cancelled. A reliable german retailer cancelled all XB1 preorders and sent an email out to everyone saying that the publisher cancelled the XB1 version of TASM2. It has been pulled from every single retailer here.