You can view the new master plan at the township building. I would think that the 1,000,000 sq. ft. of retail, office and commercial slated for the Richwood Village will be more than enough based on the areas demographics. The developer Madison Marquette will be hard pressed in capturing tenants for the proposed project based on todays economic climate. More info on the project is available at http://www.Richwoodnj.com. Yes you are correct Rowan does have plans for the Western campus.
If you are in search of a commercial site take a look at the Tomlin station commerce center.

It seems that the area is so ripe for the developement, being that these two projects you speak of were approved. Obviously, the Rowan situation has started, and seems to be moving fast. I drove through the Mullica Hill area as well, and was wondering what was going to happen with the light at the WaWa. Very interesting indeed. I don't know about the possibility of other commercial developements, but after the construction, and continued construction of RiverWinds, I think that is a trend that we may see for a while in this area.