sucks, and its really not good for him at all. Its not the same knee he did in the world cup final.... its his good knee... It basically just gave way when he was away from contact...
chiefs will be fine if McKenzie is managed well and Horrell improves his goal kicking. All Blacks will be fine too, May not even need to call in another 10. Slade, carter and Barrett is enough options, Slade was really only in the squad as injury cover himself. But Obviously there is now and opportunity for Sopoanga if any of those three get injured.
I also think that if McKenzie continues to play they way he is then he could be considered as well. If he continues to play out of his skin and turn in performances like the first full game he had replacing Cruden then they shouldn't just not pick him because he's 19, he doesn't seem like the kid who would be phased by anything and its good to have some unknown quantities in the squad that opposition teams wont know inside out.
I really dont think the All Blacks can or should just win this world cup in cruse mode, using only established players. I really want to see them pick the form players, manage them well and go for it gunz blazing. Because that's what everyone else will be doing.
There is also Dan Bowden who has been building his game nicely for the blues. I'm sure people will remember that when he left NZ last time he had basically put himself in a position where he would have been an All Black if he had stayed. Though I say that without knowing anything of his plans post this season with the blues.