User blog comment:Jimeee/Elder Scrolls Online will be subscription based/@comment-4781227-20130907010543/@comment-5469467-20130907014056

Well, there was talk of the developers pushing to have the game playable without Xbox Live / Playstation Plus. If it goes through, that means you wouldn't need to pay for Live if you didn't already have it. But since you're almost going to need Live to play other games as well, it's a bit pointless.