User blog comment:Redgarlic68/‘Phineas And Ferb’ Creators Sign Deals With Disney For Series, Feature, Potential Spinoff/@comment-3489779-20110825194154/@comment-5151799-20110827160639

Where? If I recall, during the TImesTalk conference, they said that putting P&F in school would be like their "Suite Life on Deck" - in other words, a sequel or spin-off to the original show.