In the Kurt Busiek/George Perez JLA/AVENGERS they say that the D.C. Universe isn't bound by the same rules that bind the Marvel Universe, which is why our super-heroes can do so many things that theirs can't. I think that's right--you might want to verify what I just said.
However, I'd also say that the pre-Crisis Universe had far less rules than the post-Crisis one. So in pre-Crisis, both Superman and the Flash could go beyond light speed (which is impossible and would have all kinds of physical consequences that were never explored) and they could both break the time barrier. It was never determined who was faster, but I think it's a moot point when they could both bend the laws of time-space.
In the post-Crisis world, Wally couldn't go that fast--which I guess is why Mark Waid made up the Speed Force so Wally could do stuff that didn't make any sense.
Since post-Crisis Superman can't use the Speed Force, I guess that's why he's not as fast as the Flashes. But in the D.C.Universe, super-heroes are going across the universe in record time, so I'm not sure it matters. If they are warping through space to get from point A to B, does it really matter which physical law they're breaking? The end result is the same. Since Barry can't fly and Superman and Green Lantern can fly (and through air-less space), they have an easier way of warping from one place in the universe to another. Barry would have to have something like a cosmic treadmill to do that.
If the heroes were written without plot induced stupidity, I believe whoever attacked first would most likely win, at least among the power-houses.
I think Wonder Woman or Captain Marvel. I think Marvel’s invulnerability gives him an edge but Wonder Woman’s speed and bracelets are close to invulnerability. I think WW is connected more directly to Olympus and Marvel is a bit like a genie. WW!
What, are you referring to Wonder Woman's piercing weakness?
Also Martian Manhunter and Wonder Woman have superior defenses than Shazam, because intangibility and bracelets, shield and/or aegis shield are better than Shazam's physical toughness, he gets hurt by heat vision while Martian Manhunter can phase through it and Wonder Woman even deflect it back as examples.
That’s my feeling with the league, on their best/worst day, any member would be the rest of the teams worst supervillain.
even at pre-crisis levels , superman was nothing to the spectre.