For what it's worth, the reports immediately post-intai included comments from him that he wants to be a very hands-on coaching oyakata, i.e. regularly getting into mawashi for keiko, not just sitting on the sidelines. That indicates to me that he probably still has designs on setting up his own stable. His father-in-law always seemed like a pretty diligent man when he was in Kyokai management, so it wouldn't surprise me if the details of that branch-out/re-establishment were already hammered out back when the original Oshima-beya folded - I doubt Tomozuna-oyakata will be able to block that move.(I probably should have moved my initial reply to the Tenho intai thread...this is getting pretty off-topic here. :-S)
The new Oshima oyakata would wait june 2017. At this time, Tomozuna oyakata will quit the NSK.