Phineas & Ferb: Avengers 3 Infinity War

Thanos will serve as the main antagonist of the film, with the plot revolving around the Infinity Gauntlet and the six Infinity Stones.

The sequel, Avengers 4, is set for release on May 3, 2019.

plot
Four years after the events of Guardians of the Galaxy Vol. 2,[1] the Avengers, torn apart after the events of Captain America: Civil War, join forces with the Guardians of the Galaxy to battle Thanos, who is trying to amass the Infinity Stones for a gauntlet that will allow him to inflict his will on all reality.