I really hope that they dont have names of real corporations in the game - I dont want to be setting up a set of American corps (no doubt they'd nearly all be American) such as McDonalds, Ford, Citibank, Starbucks, Tommy Hilfiger, Enron, Monsanto etc etc - that would massively suck big time. I would prefer they keep it generic by just referring to markets e.g. freight & shipping, petrochemical, automotive, textiles, agriculture, pharmaceutical etc etc. I remember one of the civfans coming up with a corporation idea that played a bit like monopoly - it seemed kind of cool - I wonder if Firaxis based corps on his idea.
I also hope that corps become available before the corp tech e.g. teas & spices and textiles