The Grandmaster discussed with the Collector about Hulk and Thor and that told that Thor was stronger then the savage. He then proposed a game where they fight each other and where they waged their Infinity Gems. As the Grandmaster controlled Thor to fight Hulk, they watched the battle from above. As soon Thor broke free from Grandmaster's control, attacked him, and the Avengers surrounded them, attacking them both, they both teleported away. Then the Grandmaster stood with the other Elders of the Universe, the Collector then told them that Earth would be interesting.
The Contest of the Champions
Later, the Grandmaster captured several heroes and villains (including Thor, Hulk and the Thing), and sent them to a off-world battlefield to face off against the Champion, for the fate of the Earth. When the Champion defeated to Abomination, Thor was the next to face the Elder, when Hulk was released from his prison bubble and attacked the Thing. The Grandmaster bet his Gems for the Champion's gems, if the latter could defeat the Hulk. However, the Elder could not win against the Hulk's strength (and thus was only was interested in defeating the Thing). He was defeated when Ben grabbed the Champion from behind, forcing Hulk beat him many times to get at his opponent, leaving him unconscious. The Grandmaster, after seeing the Champion defeated, sent all involved back to the Earth.