Well I'll be you're right. I guess I've lived in the area so long I just tune them out. Just looked at Google though and it isn't actually over Scottsdale exchange it runs over the road on the Surrey side. That mall won't be redeveloped anytime soon.
He probably means the mall on the other side where it does look to go right over the parking lots.
Knowing Delta though I think 80 -> 88 is the best stretch for redevelopment. A lot of the buildings around 72nd Ave are new so not near redevelopment. Around 84th though you have a lot of old buildings from the 60s and 70s that are prime for being taken down and rebuilt as high-rises.