So like it opens in a familiar swamp. “DONKEY” you hear in the distance. “DONKEY WHERE ARE YOU?!” All you see is some dust in the wind. Cut to TITLE CARD. Picks up immediately after infinity war. Iron Man is on Titan wondering what to do. He picks up Strange’s sling ring and uses it to make a portal to try and get back to earth. He jumps through but happens to land in some strangely animated mud. While getting up, he is attacked! “WHAT’RE YEE DOIN IN MY SWAMP” is roared in his face. Before he can say anything, Shrek stabs him and steals that sling ring. RIP Iron man. Shrek uses it to go back to the MCU. Now he’s the leader of the Avengers. They track down Thanos, and shrek kills him using a beer mug and a nearby keg. They realize he hid the stones, and they killed the only way to find out where they are to bring back the ded. They turn on Shrek, thinking he was a Thanos agent the whole time. In the ensuing fight, Ultra Instinct Shaggy blasts in and protects the Avengers from certain destruction from Shrek. Shaggy tells them there’s a better way. They could just ask the writers to rewrite the characters back in. Using Deadpool’s 4th wall technique, the snapped are brought back. The movie ends with Shrek and Shaggy sharing a tender kiss while the sun sets on the newly fixed world.