I think the next step will be selling a chunk of the club to an outside investor (I've postulated this before), so that BSH owns say 72% and someone else owns 24% (with the remaining bit being in the original shareholder hands).
The problem with that is that it will open up someone to the OADT - and it might be that people linked with the current guys won't want that scrutiny. The EFL are tightening that shit up, look at Charlton today.