World War Hulk #5

The Hulk defeats the Sentry but learns the destruction on Sakaar was caused by his own friend Miek, who wanted to inspire the Hulk to keep fighting. Overwhelmed with rage, the Hulk orders the assembled heroes to kill him before he destroys the Earth. Tony Stark narrowly defeats the Hulk with a satellite weapon then takes Bruce Banner prisoner. On Sakaar, Skaar emerges from the place where Caiera died.