>>149837412
That was the plot. He comes to our world and finds out about the "Shrek is love, Shrek is life" memes. It was going to be horrible.
OK, I'm going to pitch an idea here on the off chance some hack intern sees it and am encouraging them to steal it. Here we go:
Have the movie be about Shrek wanting his kids out of the house so he and Fiona can enjoy their golden years. It's completely in-character and an in-universe reason for him to feel that way despite all his character development. His daughter is the last kid at home and she hasn't found her "thing" yet, so Shrek decides she needs to go on an adventure to figure it out. Whether or not some inciting incident falls into their laps is up to you, but he, Donkey, and maybe Puss take her on an adventure, maybe have a fight and heart to heart at some point and then she finds herself by the end. Maybe Shrek decides he'll miss her too much and tells her she can stay in the swamp, too, by the end idk. But that's your set up. Use it, it will work, everyone will like it.