humm in sinestro vs sentry it was really a matter of screwing with his head that gave sinestro the win... the void is pretty much the power without the mental handicap and bull-crap superhero morals... so void should win this. he has the power to hurt sinestro bad and is vicious enough to go for the kill... or throw him in the sun... wear down his ring, then crush his bones... then throw him into the sun lol.
be a good fight tho.