Tony Award-nominated writer-director Alex Timbers, whose work includes Broadway's Bloody Bloody Andrew Jackson, The Pee-wee Herman Show and the imaginative staging of the Broadway-bound Peter and the Starcatcher, is attached to direct the project.

"It's kind of like 'Annie Hall' meets Cirque du Soleil. It's a romantic comedy, with a huge theatrical twist," Lopez told Playbill.com. Up Here is still in developmental stages and was last workshopped in spring 2010. The aim is to have another workshop prior to an out-of-town try-out, which the team is lining up now.

Lopez, who has been busy with The Book of Mormon and recent work for "South Park" and "The Simpsons," described Up Here as "the thing I've been most excited about for the last five years. I really can't wait for people to see this crazy vision."

"It's really hard to do an original musical that's big. I think Mormon would never have happened without Matt [Stone] and Trey [Parker] sort of defending it closely. I mean, try to think of the last musical that's sort of risky and big that you got to see? People are really really scared to put their money in something like that, and rightly so. I'm hoping to resurrect that form."

Lopez and Anderson-Lopez also collaborated on songs for the 2011 film "Winnie the Pooh," as well as a live version of "Finding Nemo" for Disney's Animal Kingdom.