While B2P and F2P/Freemium seem the most likely models for the Elder Scrolls Online to follow, we won't know for sure what direction they will pick until closer to the launch date when ZeniMax Online announces it. And of course, there's always the possibility that the studio will come up with some kind of new financial model. However it pans out, we'll be there, happily parting ways with our money.
http://www.tentonhammer.com/eso/pricing-model