I asked around and got a little bit more insight into what's happening here:
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It turns out that
none of these are desirable spaces, as one would think given their prominent locations, all for different reasons. This explains why they've been vacant or in transition for so long.
Blue and Red are too close to the entrance. People tend to take an industry calculated number of steps into a mall before visiting the first store. And when they're leaving the mall they're
leaving the mall. They could work as anchor spaces but the mall wants them deeper in so customers get pulled in and the anchor functions as a feeder for other stores with less gravity.
Blue typically has a little more value given its street presence but it is at an entrance surrounded by construction hoarding for the next several years.
Green suffers from a similar detractor. Even though it's facing Yonge, the corner is a muddy mess that people tend to want to clear as fast as possible. Not being connected to the mall directly limits the use as an anchor space.
Consolidating red and green solves the mall connection problem and my source believes that this is what's being done with the construction and redemising occurring right now.
They think it's being looked at for hospitality. It acts as an attraction and diners often have time before a reservation or after eating to explore the mall. They're also certain the new entrance and corridor are permanent. The corridor breaks up "food" from "clothes". You don't typically want a restaurant directly next to a fashion store. I mentioned Zara and Merchatto before realizing that the Zara entrance is as far away as possible from the Merchatto entrance, separated by an expanse of opaque glass walls and hidden behind an escalator — Merchatto is also directly next to a mall entrance.
The blue space is likely going to continue as popups throughout the remainder of the Ontario Line construction period. She thinks that it'll end up becoming a street side café or bakery while the red/green is sit down fine dining. The latter would open as soon as this Summer if negotiations are already underway as they seem to be if the container is being prepared for a tenant.