In what may go down as the most blunt news item ever, Ubisoft producer Alex Hutchinson said, when asked about Far Cry 4 Blood Dragon 2, "No. The answer is no, you won't get another one of those."
Yikes. But, he also said, "...hopefully we'll be able to come up with something that surprises you just as much."
I don't think anything will surprise us after Blood Dragon, but I guess we will find out!