Hendricks is by far the #1 contender, Diaz isn't.
Who cares - GSP beats both Diaz and Hendricks anyways.
Fans wanted to see GSP/Diaz last year, and now they get their wish.
Hendricks is not ready for GSP, which was pretty evident in the Koscheck fight. GSP is going to leave both of them wondering what they could have done differently.
Hendricks gets one more fight under his belt and then he gets to get beaten by GSP. The order of these two fights makes no difference.