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"Green Lantern" is most likely going to rule the box office this weekend ... but that doesn't mean it's a good movie.

So far, critics are mostly "blah" about the comic-book flick -- and its lead actor.

"For an actor so often praised for his down-to-earth demeanor, larger-than-life may simply lie outside of Ryan Reynolds' range," writes a critic for Hollywood.com.

SODAHEAD SLIDESHOW: See the celebrities who made the worst superheroes. 

Reynolds plays Hal Jordan, the first human ever selected to wear the Green Lantern ring (who is responsible for saving planet Earth, of course).

HOT SHOTS: Ryan Reynolds

While The Washington Post acknowledges that Reynolds' physique "seems otherworldly" (he is the Sexiest Man Alive, after all), their issue lies mainly with the dated DC Comic itself.

Let us know: Which celeb made the worst superhero?