House ad for Showcase #94 (August-September 1977); printed in World's Finest Comics #246 (August-September 1977)
I know that most fans are aware of the coincidence of a team of super-powered misfits headed by a wheelchair-bound leader debuting at both Marvel (The X-Men) and DC (The Doom Patrol) within a handful of months of each other...
Left: Cover of The [Uncanny] X-Men #1 (1963 series) (September 1963); pencils by Jack Kirby; inks by Paul Reinman, Sol Brodsky, or Frank Giacoia (?), colors by Stan Goldberg, letters by Artie Simek
Right: Cover of My Greatest Adventure (1955 series) #80 [The Doom Patrol] (June 1963), pencils and inks by Bruno Premiani, letters by Joe Letterese
...but has anybody commented that both made their return as "all-new" and "all-different" in issues numbered 94?
Left: Cover of The [Uncanny] X-Men #94 (1963 series) (August 1975); pencils by Gil Kane, inks by Dave Cockrum, letters by Dan Crespi
Right: Cover of Showcase (1956 series) #94 [The Doom Patrol] (August-September 1977), pencils and inks by Jim Aparo
The mind, she boggles.