User blog comment:AgentP/Phineas and Ferb movie/@comment-1758246-20100119111834

Doofenschmirts creates a time machine (not knowing that there's one in the museum) and plans to go back in time to change the future in a way that would allow him to take over the Tri-State area in the future. Doofenschmirts manages to get to the past before Perry can do anything about it.

Perry will have to find a way to the past to stop Doofenschmirts. Meanwhile Phineas, Ferb, their friends, and Candace are visiting the museum to see a new display (Could be anything).

Will Perry find a way to the past and defeat Doofenschmirts? What will Phineas, Ferb, and their friends do once their done at the museum? Will Candace manage to convince Linda that Phineas and Ferb have been doing dangerous things all summer long? All will be revealed in the new movie, [Insert Movie Name Here].

I'm getting lazy.