Superboy 5/10. Spiderman is a lot weaker, but a lot smarter and cannier. He can easily pull out a few wins.
Elektra vs Catwoman, no real clue, I dont read much Elektra
Superman 8/10. Hulk needs to get really mad to have any chance. Superman starts off with all the advantages. Of course, he'll hold back. But if he holds back too long, Hulk has a chance.
Wonder Woman 7/10. Depends on the terrain, starting distance, and how emotional Ororo is. If she starts out covered in mist or something, and lets loose, she might have a chance. But shes going to lose most of the time.
Captain America 5/10. Really even fight... Batman is a more ruthless fighter, but Cap America is stronger, doesnt tire and has a nice shield.
Flash 10/10. Uh...Flash is only about 100 times as fast...worst matchup ever...
Silver Surfer 9/10 if its Kyle, 7/10 if its Hal
Lobo 10/10. Another joke matchup
Namor 6/10. The other 4 times the telepathy takes it.
Thor 8/10. Thor is pretty badass now. Also more ruthless, tons of more experience, and better powers.
Robin vs Jubilee, no one cares
Thanos 10/10, another lopsided match.