No it's in the hands of the supermarket who have expressed an interest and the other who have expressed mild interest.
As we know, wheels has impeccable council connections, so he may be better informed than the rest of us. But my understanding is that the Chadwick/Trinity Street site has not yet been disposed of, or found a tenant, and is still in the hands of the Stockport Strategic Property Partnership, which is a partnership between the council and property firm Carillion:CBRE.
A supermarket expressing interest, whether mild or not, does not change that status, and the likelihood is that pauljonespm will be proved correct:
The build cost per sq ft is to expensive when compared to options in alternative towns.
Coming back to the Asda acquisition of the Co-op site, I would not be entirely surprised if that were to fall through now.