Willie,
I think Ford is going to be successful with their van offerings, which include the TC and Transit in both van and passenger versions.
I would agree that the minvan market is lead by the Toyota Sienna, Honda Odyssey and Dodge Caravan, but the TC Wagon may make some inroads.
I see the TC being primarily a van offering, not a minivan and that's exactly what I'm looking for. In fact I've been waiting a while for this type of vehicle to replace my wagon. Two seats in the front and cargo in the back and you can park it in a garage, as well as getting reasonable gas mileage. I haven't compared the TC wagon version to other minivans since I'm not interested in that configuration, but there are consumers that have a preference for only Ford products or a US based company. By offering a wagon version they will buy it. From a production standpoint, it's probably really easy for Ford to offer both the van and wagon version since it's primarily the same vehicle with different finishing. I'm guessing that fleet/commerial sales of the TC Van are going to be really strong. Time will tell.
ADD-ON - If you look at a side-view of Honday Odyssey http://www.socalhondadealers.com/model/2014/odyssey?utm_source=google&utm_medium=cpc&utm_campaign=SCHDA_Model_Odyssey_Odyssey&utm_term=honda%20odyssey%20com&gclid=CPDC25O6qb4CFRSOfgodvBcACg&gclsrc=ds
the design has evolved to make the van sleeker and more refined, less boxey. That may look better but it dimishes the utility of the van for hauling things. The niche that the TC Wagon may have is as a dual purpose van. People mover and cargo hauler. As I said I haven't compared the specs but there may be more cargo room in the TC than the other minmvans out there. That may be appealing to a certain market.