User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-6313047-20130627014746/@comment-1758220-20130627021347

MH3U took just over a year. It hasn't even been 2 years since MH3G ame out in Japan.

Not to mention they had to develop the Wii U version as well (and wait for the Wii U to launch) before localizing it.

I'd say we get MH4 sometime next year, likely summer/fall.