You're stuck in a castle. You find a glowing portal. A single person walks out. It's a Marvel character. Who?

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Grr. I meant to write more of a "who would you love to meet" question, and a lot of you answered the "who is most likely to have portals".
You're stuck in a castle. You find a glowing portal. A single person walks out. It's a Marvel character. Who?
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