I think the plan was to have a collection of cats in a new park north of Wellington, intended to connect up to King (possibly through the BIG project). I believe Allied picked up a property along that strip that they intend to use to fulfill the parkland requirements for The Well. (There is a property marked on the landscape plans as "456 WELLINGTON / FUTURE PARK".) But plans for that park have not been made public yet as far as I know. Hopefully it's still in the works.
Assuming it's the same lot (and I'm about 85% sure it is), that parcel was discussed at the BIG public consultation; it had been acquired for $13M IIRC to sweeten the pot for Planning, which at least at that time was being (IMHO) quite pig-headed about a number of items. The proponents spoke specifically about the synergy between that site and The Well, arguing that they'd made a big concession to facilitate this at a not-nominal cost.