Originally Posted by 8 Ball
Jaime getting his hand cut off will happen in Ep 2 I think, we'll get Jaime/Brienne fight and intro to the Bloody Mummers in Ep 1. The big event will be the Battle on the Fist, I think that's gonna get bumped up to the first episode.
According to Film Book website, in the Game of Thrones Vlog 2, Illustration videos Bryan Cogman who is an executive producer of the show and in charge of figuring out how to adapt the books for screen said it was difficult trying to figure out how to film the battle of the Fist of the First Men, and they went over many drawings and illustrations before settling on one. Actor who plays the Old Bear said he's been told that is going to be the opening scene of the 3rd season.
But, with that video where Cogman said all that, they released this picture with it:
So, seemingly they attempted to make it look like that. I'd say if it looks anything like this when it airs, it's going to be great.