Summer movie preview: Comic-book heroes hit the big screen

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PHOENIX -- Not only is summer prime time for sequels and big action-adventure flicks, it also seems to be the perfect time for studios to show off their movies that are based on popular -- or even obscure -- comic book heroes.

This summer, you'll see some heroes you know on the big screen, but there will also be some you'll meet for the very first time.

This summer's offerings on the comic-book hero front include "Green Lantern," "Thor," "Captain America: The First Avenger," and "Cowboys & Aliens."