Yeah, Hisagi will definitely have to achieve bankai, because with his kumbaya ideology, he's one of the
last people that would defeat a pre-existing Captain for the spot (Which, on the other hand, would be ironic, given Tousen's disgust for Kenpachi)...Of which would be unnecessary since his own division is lacking a Captain already; He'd just have to make one more step to get to the top of the ladder...
__________________
"I just want to lie in my own crusty filth, eating rancid egg sandwiches, until some unfortunate paramedic has to blow down my door to find my bloated and pasty corpse wedged between the nightstand and mattress stained with Bengay and Robitussin DM." - Greg Gutfeld on sex and seniors
"Syphilis does not stay in Vegas. Debt collectors do not stay in Vegas. Dead hookers stay in Vegas, but the guilt stays with you forever." - Bill Schultz