Marvel editor-in-chief Joe Quesada spills the beans in his “New Joe Fridays” Q&A session at Newsarama:

NRAMA: “Dash-Dot” – Whatever happened to the Marvel Poll to decide which character from Amazing Fantasy #15 would appear in their own series? Is that still planned? Who won?
JQ: The winner was Greg Pak’s revision of Mastermind Excello, a teen genius who met the Hulk in his AMFAN short story.
I think you’ll see Greg’s Excello costarring in one of his stories.

Click here for the Pakbuzz page on Amadeus Cho, aka Mastermind Excello
Click here for a page from the Mastermind Excello story from “Amazing Fantasy” #15