I've always imagined that if Ivanhoe Cambridge worked with Sears/Concord Pacific in their upcoming project, they could extend the mall out that way. They could pay so that they own the podium/mall part of the development, which would make Concord happy since they don't like managing retail.
I made a quick map below:
The yellow lines are the existing mall corridors and the red lines would be the expansion corridors. Highlighted in purple are Chapters/Old Navy, Sears, and Hudson's Bay. The blue part would be the new Sears Flagship should that ever come to pass.
The current Sears would be demolished, as well as Chapters/Old Navy to make way for the mall's expansion. And there is still space, in addition to the new mall retailers, for a Chapters/Old Navy relocation, a new Simon's-sized store and whatever else. Simon's could, for example, have a Kingsway frontage.