Apparently, Marriot isn't the only one interested in developing in the Peel Plaza location, according to this article in the TJ
http://telegraphjournal.canadaeast.com/city/article/757893.
Several developers have proposed building on top of the garage. Plans range from adding three to seven stories, possibly making the project a total of 15 floors!
Apparently too, they are interested in the surrounding area, and not only in the area of the garage. According to the article, the cancelation of the Elder Rock refinery(if you ask me, the postponement) has done little to kill interest in developing the area.
Who knows, maybe fellow poster, J. Rocca has some cool ideas for redeveloping the area and will let us know shortly? I hope so, and best of luck to any developer interested in developing here. I hope they do, and they do it as quickly as possible.