Fantastic 4 Comic

which comic book had alternate history of the Fantastic 4. in which they all died?

I seem to remember that the human torch suffered a case of SHC (spontanious human combustion, the thing died from bizare cancers, MR Fantastic could not maintain any skeleton or musculature and died (not sure how…) and sue disapeared never to be heard of again. I dont think it was Marvels but it was something like that ( kingdom come maybe?)

The first thing that came to mind for me was “What If” title, it took stories and changed one detail and showed what would happen, like what if the punisher had been in that church when spiderman got rid of the symbiote, the only thing is, it is a marvel title.
Here’s a link to a list of the different issues, no sure if it has all of the what if titles.

Blackest Night, Invincible, & Fantastic Four – Comic Reviews