In my head I want to think that Hendricks poses a legit threat to GSP like I wanted to think that Diaz did. But in reality I knew that GSP was going to grind Diaz down and I think that GSP will break Hendricks mentally within the first two rounds. First Hendricks will find out that he can't land a power shot on GSP because of his quick jab and a really good outside game, that will lead him to try and grapple GSP and will also soon find out that GSP can out grapple him. By the third round he will look paralyzed as he is running out of ideas on what to do.
Honestly I think the WW that poses the biggest threat to GSP is Maia, because Maia is outstanding in one aspect of the game, for the first time we would see someone who would actually want to take the fight to the ground with GSP. Hendricks is a great fighter with all around skill but not better than GSP in any one are (except punching power), so I dont give him much of a chance.