And we also find out that the F4 family manages to escape the destruction and get stranded in Battle World, possibly meeting some of our 19999 heroes, together defeating Doom, and rebooting the multiverse. At the end, the two earth combines into one bringing mutants with it.

That Earth that gonna collide with the F4 Universe is MCU'S 616 (or 19999), that's the setting for Doomsday, and we may get another villain ending where Doom succeeds in reshaping the collapsing Multiverse to his image, creating Battle World, which will be the setting of Secret Wars.

Nevermind, I was right, I was just too impatient.

Really exciting! Don't be afraid of handing them out like candies (especially in a one-shot). Of course, don't ask them for a check too often, but Sanity and Fear Saves should be made pretty often imo.

I ran a Mothership 3pp one-shot called "Plant-Based Paranoia" for Halloween and it went super well! There are things I definitely could improve on but my player seems to enjoy the session so it's a win in my book!