After Skaar and Bruce Banner rescue Kate Waynesboro from a Norman Obsborn plant (where Ms. Hand was syphoning Kate’s recently gained Old Power), Osborn sends Hand and Ms. Marvel (actually Moonstone) to neutralize Banner and the son of the Hulk.
They fight close to another Osborn plant with no clear winner. Unknown to Banner, that plant was a Gamma Lab, which released radioactive particles. Such started Banner’s cell mutation process and he will become the Hulk again sooner than later. Skaar is glad that he will wait less to fight his father to the death.
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