Spiderman(PP) vs. Flash(WW)
Who would win? I think this would be a really great fight.
Here are the scenarios I see..
Flash goes superspeed and tries to knock him out fast.
Counter: Spidey manages to web the floor and Flash stumbles off the ground.
Counter Counter: Flash fakes a flat heart rate making Spidey think that it's over. Flash then proceeds to attack him when he least suspects it.
Counter Counter Counter: Spidey with his sixth sense tells him that Flash is faking it and he continues the beat down.
The way I see it, if Flash gets on the ground he's going to beat Spidey fast unless Spidey moves around with the web. and even then, he'll have to try and leap away from the fastest man alive.