I voted that the franchise will continue, but new Pokemon will stop, or slow down.
I think starting very soon, each generation will start having less and less new Pokemon. Hopefully this isn't any time soon, but if they want to keep all Pokemon in all games (hopefully they will now, learning from backlash) I think they should cut down the amount of Pokemon. I know we are really only getting about 60-80 a generation, but for their best interest I think once Gen 12 or so hits they'll drop down to 20-30 new Pokemon per generation.
I love Pokemon for the collecting aspect (couldn't care less about competitive battling), but right now I am trying to fill the National Dex on Pokemon Home and it's a bit of a nightmare. Up until gen 7 I have a living Dex, but I've got to play through Sun and Ultra Sun completely in order to get all the missing Ultra Beasts and otherwise exclusives. If they keep adding more it'll just become a disaster for collectors. I'm not saying that everyone will have issues with the collecting, I'm just personally having a hard time mapping out what exactly I need and where to get it fastest. I like having a living dex, so trading for dex entries and trading back isn't really an option for me in the long run.