Having had a quick scan through the inspections you may be right in terms of what it might cost A&C. But rather than inflate the value of the remaining airframes I suspect it will simply see a lot of them sold outside the EASA sphere of influence.
The current market value of a C150/2 is pretty modest - facing the likely cost of 6,000 or 10,000 hr inspections - or the date deadline it is difficult to see any owner spending that sort of money.