You can look on cosmos.surrey.ca to see which parcels of land are city owned. They are coloured in Pink.
It would make sense to fit in around the area of the BC Lions training facility / baseball diamonds / soccer fields. This area is identified to be focused on sports/recreation in the City Centre Plan.
The pink city owned properties next just to the north of the baseball diamonds south of 108 / west of University will not be the site however. I know for a fact that 5 towers are being planned for this site right now.
I dont see any big city owned parcels around Scott Rd except for where the Ice Rinks are going.
The Soccer Stadium could go elsewhere in the City. Makes more sense in the City Centre or Scott Rd area though.