I've had a look at both the Chapters website and
DC's website and there is no mention of Chapters, but then again they have no stores listed for Phase II despite the fact the buildings are going up and should be ready realitivly soon.
If this building does turn into a Chapters store, though, it is possible both could stay open. Bedford has two book stores of the same company (Coles and Indigo) right across the street from each other so it is possible for both to survive but due to the size not likely. The section of Mic Mac that houses Chapters is already losing Future Shop (this fall) so it would spell bad news.