I am curious how central the so-called park will be for the development vs just a way to offload some land on the side that they think just isn't needed for commercial retail space for this market. I expect more suburban shopping centers will do similar offloading of land in the coming decade
Not sure about the design of this particular park, but most of the suburbs have rules against commercial and residential land being given back to the city unless it aligns with their existing parks and recreation plans. The area of north Dallas might be an exception because Dallas is continually dinged on the national 'best park system' listing because north Dallas is seriously lacking in neighborhood parks. So north Dallas needs parks, but not sure about the implementation in this specific location.
If I've got the correct location, there is a school next door with sports fields but no park/playground, so it's an excellent location for a city park.