Assuming john has a plasma pistol, Going by book lore two things would happen. It would melt straight through batman's armor and it would EMP all his gear. Dead batman is dead. Also all the argument about who knows more martial arts is useless. It doesn't matter how many moves bats knows the simple matter of fact is Johns reaction time is far faster, coupled with Cortana it becomes even smaller a delay period. Since the bat series prides itself on at least half way obeying the laws of physic bats could never move faster than john. Period. two people that might beat him. Thor, simply on being a demi god. 4k universes space marines because their canon is ridiculously OP.