OP-verse invades Narutoverse with a fleet of ships, trying to land on the coast and conquer territory inwards. Narutoverse gets info about the invasion and some prep-time. No Edo Tensei. All characters on the respective side work together, but keep their personalities and personal animosities.
That's interesting. Some rules might have to be figured out beforehand, like, what do both sides know about each other, where the invasion will begin, and how long the Naruto-verse has to prepare.
I guess the location of the invasion could be part of the debate, since not everyone may agree.
Edited by Tale, 31 March 2015 - 10:47 AM.