User blog comment:GabriellaCullen/My Prediction On This 'Alternate Ending'/@comment-89.242.47.173-20120907163758

"SOMETHING'S HAPPENING WITH KATE AND GARRETT THAT I CANNOT UNDERSTAND. She looks like she's getting hurt, but at the same time, it looks like she's protecting them both?? Actually, I'm not sure if that's Garrett or not. LOL."

I'm not sure if you've read the books, but judging from the fact you know character names etc I'm going to presume you do. The scene you see in the trailer where Garrett is holding Kate is a scene in the book where her sister Irina is executed by Caius in order to provoke a reaction from the Denali clan. Immediately Kate and Tanya try to fight the Volturi but several member of the Cullens jump on them to stop them from doing so. Rosalie tries to grab Kate but she shocks her (Kate has the ability to generate electricity) and so Garrett throws his arms around Kate to stop her from making a fatal mistake. In anger she shocks Garrett so he will release her and she can attack. This is the scene you see in that clip; Garrett trying to stop Kate from attacking the Volturi.

My theory is (and it's also shared on some gossip websites) that this fight scene is not real. Aro can read thoughts with a touch, and I think Alice is showing Aro what would happen should the Volturi decide to execute Renesmee and fight the Cullens and their friends. In the book, the ending is too simple to be translated into a Hollywood movie. We need action and drama, and the ending in the Twilight book has none of that except for a few heated discussions. Apparently in this vision Alice shows Aro you will see many members of the Cullen's die; including Bella and Edward themselves (not before finishing Aro). Conversely, we will see members of the Volturi die at the hands of the Cullens (like Jane and Alec).