Phineas and Ferb: Return To The Second Dimension is an upcoming sequel of Phineas and Ferb: Across The Second Dimension.
Plot[]
One year after the events of Phineas and Ferb: Across The Second Dimension, Phineas and Ferb are very excited about Perry's 6th anniversary. To celebrate they decide to use some cool gadgets from Perry's lair (Ready For The Bettys) to have the awesomest day of summer ever! But that awesomeness leads them into some HUGE trouble...