@bold: Orochimaru doesn't need to control him the same way he didn't need to control him during the war.
Pein is a threat to Konoha, Hashi would step up on his own.
Oro has only controlled hashi 1 of two ways.
- Full control [i.e vs hiruzen]
- No control [current]
If oro uses fully controlled hashi then he still loses because hiruzen managed to take down the senju brothers in that condition.
If oro uses hashi with no control then hashi breaks free because:
a) He will not stand for having oro use him as a tool to do his bidding.
b) Pein in this scenario is not attacking konoha, so he's only posing a threat to oro.