Funny, the opposite happened at VGF. When they added the new hotel rooms to the existing association, the value dropped...
I bought into VGF direct this past year and saw how the resale value dropped.
I was thinking it could be because Disney did not need to buy points to sell those who were wanting to buy VGF direct and I think currently are still not in dire need.
Also a second thought is Disney is still trying to sell points direct at VGF at a discounted rate. I expect at some point, Disney will raise VGF back to the $245 (or higher) that it was at before the addition of the villa rooms to buy direct which will have a direct impact on the resale value of VGF contracts. If people want to stay at VGF but don't want to pay the direct price, they will want a resale contract going for less.
However, regarding Poly, I have a feeling many will want this new resort because it will finally offer 1 and 2 bedrooms which the current poly does not have and I think the views toward magic kingdom will be amazing. Also, I think Disney will try to market various room types with varying point ranges similar to Riviera with tower rooms all the way to 3 bed villas-standard to preferred.
If Disney does pool the new Poly Tower, then the resale contracts may be hard to come by at the time of sales start for the new Poly Tower in late 2024 due to the fact Disney chose not to ROFR now or in possibly this next year. There will be little choice but to buy into Poly direct if you one really wants those rooms and views.
So I personally think in about 2 years Poly resale value will go up due the sale of the tower if points are pooled.
Of course this is all hypothetical and possible wishful thinking on my part.
As much as I love seeing these low prices. I do want to see prices rise on resale, eventually, so that I know my contracts are worth something if I need to ever sell.