I saw most of Thor(I missed the first 20 minutes or so.), and I was very surprised to see some of the characters from the Planet Hulk storyline. The Hulk versus Thor gladiatorial/ combat fight also seemed like it was out of Planet Hulk as well (When Hulk fought the Silver Surfer.). I could be wrong, but I'm pretty sure that they were using Planet Hulk. I guess that the storyline must be a classic then. One thing that I'm unclear about is how they captured the Hulk, or how they got a hold of him. Also, how could the Valkeyrie NOT know that Bruce was the Hulk? It kind of makes me want to see a reboot of The Hulk movie franchise.