Pixar is going a little older in 2009 than its typical demo.The Disney-owned toon studio’s release that year will be “Up,” about a 70-year-old man who teams with a wilderness ranger to fight beasts and villains. “Monsters, Inc.” director Pete Docter is helming. Pixar vet Bob Peterson is writing the script and will co-direct. Monday’s announcement fills in the remaining gap in the animation powerhouse’s sked through 2010. After this month’s “Ratatouille,” it will release “Wall*E” next summer and “Toy Story 3” in summer 2010. Its sibling Disney Animation Studios, also overseen by Mouse House toon toppers Ed Catmull and John Lasseter, is set to release “American Dog” next year and in 2009 “Frog Princess,” its first hand-drawn pic since 2004.