Phineas and Ferb: Mission Marvel

 is an upcoming special episode from the fourth season of Phineas and Ferb that will serve as an animated crossover between Disney and Marvel. It will premiere in the summer of 2013.

Synopsis
Spider-Man, Iron Man, Thor, and the Hulk enter Danville after Dr. Doofenshmirtz's latest "inator" scheme accidentally removes their powers and immobilizes them. Now it's up to Phineas and Ferb to team up with the Marvel Super Heroes to help them regain their powers and defeat Marvel Super Villains – Red Skull, Whiplash, Venom and M.O.D.O.K. – who are working together with Dr. Doofenshmirtz to use his power-draining technology to create mayhem.

Background Information

 * Disney has confirmed that this will be a crossover with Marvel, as formerly happened with the online game Club Penguin.
 * It will be the show's second one-hour special, following Phineas and Ferb Summer Belongs to You!.
 * Dan Povenmire revealed in an interview that Heinz Doofenshmirtz creates the "power-drain-inator" with the intention of draining his brother's "power" as mayor of Danville, but it mistakenly hits Marvel's heroes. In the same interview, Jeff "Swampy" Marsh said that Candace's plot in the episode is going to involve her love to comic books and fan fiction.
 * This will be the first appearance of 'Spider-Man. Prior to this episode, he was parodied twice in the series canon ("Bowl-R-Ama Drama", "Phineas and Ferb Christmas Vacation!").

Production Information

 * The storyboard of the episode's final act consists of 1801 pages.

Continuity

 * The Beak presumably appears again. ("The Beak", "Phineas and Ferb The Movie: Across the 2nd Dimension")
 * According to promo images, Candace reprises her Dangeraffe "secret identity", also from "The Beak".

Allusions

 * Marvel - Marvel characters appear throughout the episode.

Cast
The following are expected to be involved in the special:
 * Vincent Martella as Phineas
 * Ashley Tisdale as Candace
 * Thomas Sangster as Ferb
 * Alyson Stoner as Isabella
 * Caroline Rhea as Mom
 * Dan Povenmire as Heinz Doofenshmirtz
 * Jeff "Swampy" Marsh as Francis "Major" Monogram
 * Tyler Alexander Mann as Carl
 * Dee Bradley Baker as Perry
 * Bobby Gaylor as Buford Van Stomm
 * Maulik Pancholy as Baljeet
 * Kelly Hu as Stacy (possibly)
 * Drake Bell as Spider-Man
 * Adrian Pasdar as Tony Stark/Iron Man
 * Travis Willingham as Thor
 * Fred Tatasciore as Hulk
 * Wally Wingert as MODOK
 * Charlie Adler as Red Skull
 * Troy Baker as Venom
 * Peter Kelamis as Whiplash
 * Stan Lee as TBA (confirmed in Swampy's Tweet)