Speedster + Stretcho = Super Cheat

Flash (Barry Allen) - Mr. Fantastic

And yet…hasn’t Reed Richards already been assigned to Steve “the Freshmaker” Dayton? He has indeed. But this will one of the very few times that a character from one diaspora does double duty with characters from the other.

Barry Allen is the character that ushered in the Silver Age at DC. He also is the premiere speedster in all comic-dom. So in the latter regard, shouldn’t he be paired with Pietro Maximoff, i.e. Quicksilver?

Well, no. Allen and Maximoff are the fastest ones that be in their respective universes, but they share nothing else. Maximoff is an arrogant mutant from Central Europe, whereas Allen was written as a textbook decent, reliable midwesterner.

I tried pairing Spider-Man and Henry Pym with ol’ Barry. But finally, I decided that the key Silver Age DC character should be assigned to one of the four that did the same for Marvel. That Allen has been the one of very few characters to stay dead in either universe, and that Dayton is relatively marginal, makes this rather egregious cheat easier to manage. So below, the 50s-60s Flash mythos is translated into Richards-ese…

Commonalities:
Both Allen and Richards are supremely intelligent, if absent-minded, and highly moral fellows, and are thus respected by their colleagues.

Differences:
Allen runs faster than anyone else; Richard stretches his body in numerous and versatile ways.

Alternate history:

MF: Scientist Reed Richards is struck by cosmic rays: his body then becomes incredibly elastic. He becomes a crime-fighter, culls a "rogues gallery" of super-villains and helps found the Avengers. He later marries Susan Storm and takes on her brother Johnny, also altered by cosmic rays, as a partner. After Susan’s seeming murder, he becomes more and more unhinged and finally sacrifices his life to save the universe.