You didn't think EA would stop at Battlefield 3, did you? Apparently during a keynote at the University of Southern California, Electronic Arts president Frank Gibeau said, "There is going to be a Battlefield 4."
So we can take that as official confirmation? You know, the president of Electronic Arts saying that? Um, no. Sorry.
EA told IGN, "Frank was speaking broadly about the Battlefield brand—a brand that EA is deeply passionate about and a fan community that EA is committed to."
If I were to speak broadly about, say, hamburgers, and you said, "Brian, how many hamburgers do you want?" I'd say, I want some hamburgers. But, if asked me, and I was being very specific, I would say, "Reader person, I would like four hamburgers."
http://twitter.com/#!/bwinfrey/status/134083231569035264">President on @EA just said [Twitter via IGN -- Thanks Thomas!]