User blog comment:Mobo85/Walt Disney Studios Cancels "Phineas and Ferb" Feature Film/@comment-11643042-20130823134859

There was a little information that I got. According to a YouTube commenter, Meap and Mitch return (again), Doofenshmirtz gets Agent P fired for a crime he didn't commit (again), and Isabella reveals her affection to Phineas (again). Seeing that Dan and Swampy wanted to keep the info under wraps, though, I would guess it's only speculation. But who knows?