User blog comment:Black Spiderman/Phineas and Ferb: Across The Second Dimension/@comment-406459-20100303220032

To quote from Disney's official press release:

"The #1 animated series for the past two years among Kids 6-11 and Tweens 9-14 has inspired a television movie to premiere in summer 2011 on Disney XD and Disney Channel. In the movie, Phineas and Ferb discover that their beloved pet platypus, Perry, is really a secret agent who battles the forces of evil daily. The boys team up with Perry on a grand adventure through a parallel universe where they must ultimately thwart an even more evil version of Dr. Doofenshmirtz. The feature-length movie is another boon for the animated comedy which will also lead an all-summer 2010 initiative on Disney XD and Disney Channel, including an hour-long episode guest starring Clay Aiken and Chaka Khan. The series continues to create opportunities for other Disney lines of business: the “Phineas and Ferb” characters are at Disneyland Parks and Resorts, Disney Consumer Products debuted a toy line at Toys R Us, and “Phineas and Ferb” is a top selling apparel line at Walmart and Target. Other items include books and comics from Disney Publishing, the #1 Nintendo DS game at Game Stop and BestBuy from Disney Interactive Studios, episode compilation DVDs from Walt Disney Studios Home Entertainment and a soundtrack on Walt Disney Records which ranked #10 on the Billboard children’s album chart for 2009."

It looks like Phineas and Ferb have their next two summers already planned. Now that's determintion to the extreme!