It looks like Office Depot and OfficeMax are in merger talks according to this article:
If I would guess, even though Office Depot is the larger of the two, I would expect OfficeMax would be the acquiring entity as they are in better financial shape. As for the name, that is a bit hard to determine. Interestingly, there are NO Office Depot stores anywhere in the Phoenix metropolitan area; they pulled out of the market in 2001.
Note that Office Depot tried to merge with Staples in 1997, but the deal was blocked due to concerns that it would have led to higher prices and reduced competition.
[Edited 2013-02-19 19:23:26]