It was a great weekend for comic book fans. First, Saturday was Free Comic Book Day. I hope you were able to celebrate (I did!). Second, Marvel's (NYSE: MVL) X-Men Origins: Wolverine, licensed to and distributed by News Corp. (NASDAQ: NWS), opened on Friday.

As expected, it completely annihilated the competition (I would have said clawed the competition, but I'm sure that pun has already been done to death by now) at the domestic box office over the weekend.

Disney (NYSE: DIS) did its best to act like a good corporate citizen when it released a "green" film on Earth Day. The title? Appropriately, it's Earth. I didn't see the movie, I'm sure it was decent enough.

Over the three-day weekend, Boxofficemojo says that Earth grossed $8.5 million as of early estimates. If you include the Wednesday and Thursday showings, Earth has so far banked about $14 million for itself.

In terms of ranking, though, that $8.5 million statistic places the project in fifth place, behind such multiplex entries as Sony's (NYSE: SNE) thriller Obsessed, starring Beyonce, Time Warner's (NYSE: TWX) 17 Again, and Viacom's (NYSE: VIA) The Soloist.