Originally Posted by Mr.M
If there was a direct link from FC3 to X-4, you are talking about a gap from the 70's or 80's, to sometime after DoFP, which is probably 30-40 years later. I don't think you can write a coherent, structurally sound story with all those years in between. I can't see a FC 3 taking place another 10-15 years after 1973 let alone a few years prior to DoFP or X-4.
im guessing a 3rd FC it would be set in the 80s
and they could write a way to connect it to X4 if they are creative enough, its pretty much what they are doing now with DOFP
in many ways it would help spread the fanchise out abit, FOX won't be in any rush to reboot this franchise