So ... who is it? Dan Gilbert on Friday afternoon hinted at some large office tenants looking to move to downtown Detroit.

During a 50-minute discussion with KC Crain, executive vice president and director of corporate operations for Detroit-based Crain Communications Inc., the parent company of Crain's Detroit Business, Gilbert also suggested that announcements would be made soon revealing key questions: Who and where specifically? And how many square feet?

I don't think one of them is Snapchat, although I could certainly be wrong.

During the discussion, which took place at the College for Creative Studies' A. Alfred Taubman Center for Design Education, Gilbert also said that "hopefully" the Venice, Calif.-based photo sharing app company will be "opening up an office around here soon."

That's a bit more of a specific hint, although we still don't know where, when or how many square feet it would take if a deal gets signed.

The company already has a sales team in the area. We'd heard a couple months ago that Snapchat was looking for office space around Detroit. Russ Caditz-Peck, a spokesman, told me at the time that the company doesn't "have anything to share on this." I reached out to him again Friday afternoon for comment, but have not yet heard back.

In an interview six weeks ago, Gilbert told me that "there is one (large office tenant) you haven't gotten ahold of (reported)."

Friday's discussion was part of the Technology in Motion preview event. The expo and conference is scheduled for September and is being put on by Crain Communications and MSX International.