This is a project that ever since news broke in the summer has been a political mess and a half for the Region, it got political enough that staff from engineering firms doing field work couldn't go to site individually for a couple of weeks. It did end up settling down but it was a tense environment.
As sixrings pointed out the area to the north of Hwy 7 between the McDonald's and Nafziger Rd is currently being developed for a new industrial subdivision called the Wilmot Employment Lands, those involved just call it WEL, this past summer site grading was in full force with 2 different cut and fill locations, the Google Maps satellite view is from August roughly. Regardless that development has 92 acres zoned for industrial, plus numerous acres for parkland/SWM/roads.
One of the main complaints is how there's a bunch of land on the Breslau (airport) side of KW, it's called the East Side Lands, but the issue with it is you can't get an easy large parcel anymore without having to buy out developers who've known about the East Side Lands for years now. You have 2 large residential subdivisions by Madison, one is known as Madwest which has phase 1 site servicing under way with grading for phase 1 completed this summer, the other is to the north of Middle Block Rd. Everything to the south of Middle Block Rd and west of Fountain is actively being developed, you have the giant iPort project, you also have numerous other warehouse projects and offices that have been completed.
The other issue with the East Side Lands is its scattered with wetland complexs and wood lots which can't be touched so if the region wanted to buy up land in the East Side Lands they should've done it years ago which is how the problem really started.
Another issue that the public didn't like was how far from KW it was and how it would create traffic, now yes it's far relatively speaking from KW but the Region cannot put any development closer since all the farmland between this site and KW is protected farmland. It's the primary recharge area for the cities water supply, the vast majority of the cities water comes from the aquifers below that farmland, this aqufier basically wraps the entire west side of KWC and the south side of Cambridge.
The last really big issue the public absolutely hated was everyone involved had NDAs, the Province, the Region, the engineering firms involved. Which made it complicated for people in the know because it was so front and center for a couple of months.
The public out cry calmed down a bit on social media once various people explained why the site was chosen (what I've said+hwy access and close CN access) and hinted at what it was for but either way it's been a mess for everyone involved.