unfortunately for the TC, i don't think anyone on these forums will figure out a timeline for the simple fact that this doesn't seem to be an aspect GF gave much importance/thought and if they decide to establish one, it's kinda hard to do it solely with the current generations.
even IF they intend to do it they'll probably need 1 or 2 more gens to tie everything nicely without raising too many questions.
the most we can do is to find out the number of possibilities available.
there is no such thing as a solution at this point and many "evidences" are wishful thinking (when trying to use them as proof opposed to possibilities) just like the majority of the hints regarding the remakes.
anyway, the way i see it, this thread is rather pointless so i'll just go back to the lurkers corner xD