the probablility of SC #22 eclipsing AF #15 in our lifetimes is zero
+1
I'd say the likelihood of even SC4 ever eclipsing AF15 again is very, VERY slim (thumbs u
A lifetime is a long time, never say never. But you are probably right on at least one level. Spider-Man has more universal appeal, and has become somewhat of an icon, whereas I doubt the Flash character (or Green Lantern for that matter) has the legs that Spidey does or the capacity to achieve similar status. Still, Showcase #4 and #22, are like AF #15. legendary.
BTW, I'm covered on both fronts too