You may not have noticed but DSA is already a business park.
Robin Hood Airport Business Park offers Industrial, Office and Distribution Units in Sheffield
along with what is left of SZD
Sheffield Business Centre - Peel Land and Property
Peel are primarily a land and property company specialising in buying failing companies with lots of land. Their first real project was the underused Manchester Ship Canal, just look at Trafford Park and all the other developments on the disused docks.
About Peel Land and Property - Portfolio of Commercial and Residential Property in the UK