Oro's been anally raped by Itachi too many times for it to be debatable that Oro would be able to do anything in this fight.
hes never wanted itachi dead before. and besides true form oro solos itachi due to his poison blood which affected even sasuke whos immune to most poison
Now he can use that swamp which can be countered with chidori nagashi
no it cant. jsut because lightning > doton doesnt mean a GIANT HUMUNGOUS BATTLEFIELD ALTERING doton is beaten by a little electric shock
Jiraiya may try frog song but that is countered when Itachi and Sasuke look each other in the eyes and cancel out the genjutsu.
when will they have time for that? jiraiya isnt the one doing the genjutsu. he can finish the bros with stone swords