I believe its population in 10 years will rival that of Lakewood today. (My numbers may be off, but this means going from somewhere in the 25,000 range ka”h to 70k or so.) And while my “guess” is as good as yours, I’d say about 1/2 of that growth will be “natural growth” and the rest will be from many Chasidim relocating from Brooklyn and their expanding families.
Additionally, some other Chasidim besides Satmar might slowly but surely find Monroe hospitable due to its affordable cost of housing and many amenities. Satmar in its variations will probably lose the monopoly there, it’s just a question of time.
Just to be clear, I’m not just talking about the proposed Town of Palm Tree, which will most likely win in this week’s referendum, but the many large developments, and new individual home-buyers cropping up in Woodbury and beyond (outside the proposed Town borders).
I wish them lots of Hatzlacha, but hope Moshiach will come sooner and my predictions will be for naught…