I feel that at a certain point it's just going to be way too many for the average fan to keep track of. Especially kids. And we all know GameFreak caters to kids first and foremost. Seriously though, imagine being completely new to this franchise when you have 1000 Pokemon (with probably another 200 hundred forms) and all of the moves, abilities and everything else to remember. It won't be accessible at all.

GameFreak know this. It's clear they've been trying to delay it as much as possible, with the last few generations introducing much smaller batches of new Pokemon than we were previously accustomed to. I think Mega Evolutions and Regional Variants were also introduced as a way to add more new designs without inflating the dex further.

So yeah. What do you think will happen? Will the series just continue as normal, and add even more Pokemon every few years? Will there be a hard reboot, starting the dex over from scratch and reintroducing a few dozen old Pokemon every few years?