User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-6050823-20141029004407/@comment-2194133-20141029102006

All gens exist together. This is confirmed by the Yukumo Festival in MHP3rd where we see Cha-Cha and everyone else from the previous Gens including Nekoht and the Great Elder all relaxing together. It is also a bit wrong to say that 4th Gen is the "future" because it isn't, it is the present. All previous games are the past so with every title the present advances several years.