VV will be our first choice keeper for 6 years at least (he is 26 now, no way will he decline before he is 32). On that assumption, any keeper that starts to take over from vv will have to begin to do so in 6 years time. That keeper will be around 22-24. Oier olazábal will be 25 then so we COULD look into loaning him out and bringing him into the frame in 5 or 6 years (because keeping him to backup for vv before then would mean he gets hardly any games experience). But this is assuming vv doesnt pass 32, which is unlikely in my opinion.
I think we should stick with pinto, replace him in a few years with another veteran, and then a keeper who is around 14/15 NOW would have made a small name for himself and he can eventually replace vv.