2 sasgey is deff going to lose to the 8th because he dose not have enough exp to defeat a enemy of the 8ths callaber sorry I can't spell saskue was almost killed with the 8th barley tryin with ms or not he dose not stand a chance so he most deff going to die or run and try to regroup be cause that attack was sloppy.
3 I think sending saskue to fight the 8th was a set up by marada to kill him because he must know that saskue is eventualy going to betray him.
4 I think pain is goin to either destroy the leaf or he's goin to kill a lot of people and leave a message for naruto and I also believe like most of the others he's real body is sum were else contoling them from afar
Well, about Sasuke and the Hachibi: I think that his whole team -but not him alone- will be able to win. There is no reason why a 16-year-old ninja can be able to win easily a fight against a grown-up jinjurichi that is able to control the 8-tailed beast, which is the second most powerful of all.
I don't think Madara did everything for Sasuke to be killed; he needs the 8-tails, remember that for some unknown reason it seems necessary to first have the 8-tails, he just wanted to make sure Sasuke would not get the 9 tails, probably because he was afraid Sasuke might want to keep the demon fox for himself. However, he may want to kill Sasuke in the future to get hold of his body.
About Pain: I don't think he wants to leave any message to Naruto, he will just try to find out where Naruto is, or when Naruto will be coming back - after destroying Konoha at least a bit.
no matter how hard i try i can't see sasuke and karin kissing
(now sasuke and sakura i can see)
Although I have no reason to believe any of this couples should exist, I can see Sasuke kissing Sakura, Hinata, Ino, and even Naruto... but never Karin!
There's another couple I am not able to imagine, although I have nothing against her: Shiho (the girl with spectacles at the decoding dept) and Shikamaru. Maybe if she starts to use contact lenses she'll have a chance.