What happened in the end?

Well, at the end. There is this fight scene that Alice shows Aro and compared to the baseball scene in the first movie, the baseball scene is nothing. But Alice influences Aro and the whole family and Friends leave happy and Renesmee is safe.

They go to fight the voltori but Alice tells the leader the future and he dies to they dont fight eachother! Hope this helped! there is a lot plus in the story but it would take ages for me to explain!