Phineas and Ferb: the Brave and the Bold!

'Phineas and Ferb: the Brave and the Bold! is an upcoming crossover between Batman: the Brave and the Bold and Phineas and Ferb'. It is one of many planned B:tBatB crossovers.

Teaser
Batman and Captain Atom put a hult to Lord MonkeyFist's plans to devolve humanity back to apes.

Main Plot
Phineas and Ferb decide to team up with Batman and Green Arrow, who are in town when their mutual nemesis, the Clock King, is in Dansville. Meanwhile, Perry the Platypus must stop Doofenshmirtz's plans to outshine other supervillains by eliminating Batman, while Candance, after hearing that Batman and Green Arrow are Jermey's favorite superheroes, tries to get their autographs for him.

Whatcha Doin'?
Isabella: Hey guys! Whatcha doin'?

Phineas: We're gonna team up with Batman and Green Arrow to track down Clock King and put a stop to his plans!

Isabella: Wait, what?

Ferb's Line
That's one badass car.