There is mate. Drop the plan to distress ACL in the hope of picking up the whole thing on the cheap, and bring the club back to the Ricoh. In itself this will make the club a few million quid next season and rebuild a few bridges.
Once there, start negotiating in good faith, perhaps along the lines of the original roadmap. In other words look again at the Higgs share, clearing down some or all of the mortgage, and persuading the council to extend the lease. But don't expect to conduct these negotiations purely on the back of a valuation done on one part of all this, ACL, at the point when their business was at its lowest point due to SISU's own actions.
In fairness this isn't likely to be cheap. Between them Higgs and CCC have got around £20m tied up in ACL. But I still think it should come in at a lot less than the cost of another four seasons at Northampton and the building of a newer, smaller stadium somewhere outside Coventry.
Seems entirely plausible to me, but clearly SISU would rather persist with the JR and the hope of somehow getting the whole thing on a much cheaper basis, partly through the courts, partly by keeping CCFC in Northampton, partly by pressuring the Council through some kind of fans' group perhaps.