Sorry replying a little late.
As chair of a TMO I would say it is unlikely that you will be able to stop redevelopment/regeneration of an existing estate or block of flats.
Any recourse would be in your management agreement, so at best a TMO may be able to delay things if agreed consultations have not taken place, and if the TMO residents make a strong enough case they may reconsider. But as the landlord and owner it would be unlikely you could stop it if the landlord was determined.
I would recommend getting in touch with the NFTMO for support and help.