That is very likely. You don't just randomly sell the property. Makes sense they would have went through the whole development process and got is approved as a phased project but really only wanted to build the veteran's building. They then are selling the property to help pay for that and having a DP in place ups the price of the property considerably.
Pretty smart and you see it in residential where someone wants to build a nice new house so they buy a large property, subdivide, get that all done, then sell all but the property they want to build on so their home is essentially free.