The final scene in which Banner grins as his eyes turn green was left deliberately ambiguous. It was meant to show that Bruce finally learns to control the Hulk which will be confirmed in The Avengers.
[Amalgamation= the process in which separate organizations unite to form a larger organization or group, or an organization or group formed in this way] Marvel + DC IS THIS EVEN LEGAL? But hey "Bat-Spider" that's me if you add Lady Darth :D
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