I really think many of the people here need to take a deep breath. As I said earlier, and others have said, this is NOT going to be a typical Starbucks that you'd find on every street corner, I can almost guarantee that! Plus, Starbucks is not the first corporation to come into Disney World. McDonald's had a presence in Disney, and many other brands still have a presence in Disney. LTT is sponsored by Craisins, TTA is sponsored by Alamo, the Land is (was?) sponsored by Nestle, and the list goes on. Brawny even tells us how to wash our hands in the bathroom... They all have brand logos on their sign. This is nothing new.
I don't think the look or feel of Main St. is in danger any more than it's endangered by the enormous gift shop taking up the entire left side (the Emporium.) I doubt they sold that many t-shirts or coffee mugs in the early 1900's.
PLEASE look at how Starbucks was incorporated into DCA:
http://www.disneyfoodblog.com/2012/...-fiddler-fifer-practical-cafe-with-starbucks/