It seems that UbiSoft is getting ready to announce Far Cry 4 in the near future.
Ubisoft senior vice president of marketing and sales Tony Key stated in an interview regarding the Far Cry series, ”We’re totally psyched from (Far Cry 3). It’s a great brand, and now it’s got the recognition it deserves, so we’re clearly going to make another one: more on that soon.”
There you have it - stay tuned.