X-Men + Fantastic Four: 4X
Wayward son! Every known mutant lives on Professor X's newly forged island paradise of Krakoa - except for one. And now the X-Men feel that it's time for Franklin Richards to come home. There's only one problem: What does his Fantastic family have to say about that? As lines are drawn, the X-Men face down the Fantastic Four - and nothing will ever be the same! In this brave new Dawn of X, Charles Xavier and his fellow mutants have reshaped the world. But you can't change a world without encountering its true master: Doom! Now, with the fate of the nation of Krakoa at stake, Franklin faces a momentous decision - and the X-Men and the FF must fight to save the future! Lines will be crossed, enemies will be made - and the Marvel Universe will be turned on its ear!
Collecting X-MEN/FANTASTIC FOUR (2020) #1-4.