what difference does it make to kill him now and wait a couple of days on the bridge ??? (so as not to impersonate) at the same time Gato is an ordinary person, why not just throw the illusion of "helping people" and that's it ??
He should hire the duo nothing better than having your own private forces. The hokage and danzo would be liberally salivating to add a 7 swordsman and a new genkai clan to konoha to make children who will grow up to be perfect subordinates.
