Didn't quite make the list...
Mayflower Mall, Sydney NS
72 stores (under development into 85 under one roof, 91 when annex added)
GLA: 416,327 sqft (+18,000 sqft in annex...also not sure if that's before or after redevelopment and expansion of old Wal-Mart store).
Those numbers are direct from
Mayflower Mall website.