Martian Manhunter has alien powers that enable him to seek and destroy all who stand in his way. Of course The Flash is fast, but in the end he’s not fast enough to win this match. Martian Manhunter takes the round. Martian Manhunter wins.
Hawkgirl can fly and defeat some opponents. Sadly for her she just can’t beat enough opponents. In the entire Justice League (Main 7) she is the weakest. She just lacks the power that the others possess. Flash wins.
Wonder Woman has super strength and can defeat The Flash. Flahs has super speed that should let him win most fights. But Wonder Woman just needs to create an eaarthquake and slow Flash down for a second. That’s all the time she needs to take him out. Wonder Woman wins.
Maybe I’m overestimating Batman’s power ups, but with his Green Lantern ring he can stop Flash’s speed. After that with Superman’s strength he could stop the Flash cold. The Flash is a great fighter so it’s too bad for him that he’s in such a tough arc. Batman wins.
Superman has super strength that can’t be denied. The Flash may be pretty fast, but he’s just not tough enough to deal with Superman. Superman is the world’s strongest kryptonian and he cannot be defeated by mortal means. Superman wins.
These 2 are really fast. They both also don’t have much hand to hand combat skills. Flash might be slightly better at fighting but Sonic has Super Sonic form. With that he’s probably faster than Flash and he can possibly shoot beams. Sonic wins.