'Green Lantern' Screenwriter Talks Casting Superman's Cameo And More

'Green Lantern'FROM SPLASH PAGE: The "Green Lantern" movie is rolling right along, co-screenwriter Marc Guggenheim tells us -- even if digressions about other comics characters sometimes distract them from the task at hand.

"This morning, we sat down to talk Green Lantern," Guggenheim told MTV, "and we ended up riffing for an hour and a half on another, much more obscure character. Sometimes, you just have to roll with it when inspiration strikes, you know? I'm sure the studio wouldn't be happy about it, but we're not going to blow the deadline. We'll get it in."

Read more about casting Superman's cameo and other updates to the "Green Lantern" movie on SplashPage.MTV.com.