I might have quite pokemon then, probably because i wouldn't buy bw bw2. With no new pokemon, there would be far less to look forward to, so little to explore, discover... yeah, theres the region and all, but for me, its the pokemon that were the greatest joy to discover.
And why i would quit? because i would have gen V. i might like VI if it had new pokes, but since cross gen compatibilty has been linear until now, i wouldnt get my awesome gen IV pokes in and would have to start over. and so i would cry, and would quit before that. personally, i think gamefreak would have hit an all time low in sales for BW if they had had no new pokes.