Quite a few people have and will contionue to have a mix of old and new pins in their collections. Mine is about split (SS, MB, ToM, BoP are 'old' and METLE, WOZLE, MMLE are new). I like it that way. Many others do too.

You are basing your 'high cost pins price crash' on one pin being remade. If this is the only one, the prices of the others won't drop much, if at all. In fact, they may rise if buyers know they won't be remade!

I do agree the price of MM will drop. How much. Who knows. Remaking MM was only possible because enough people want the title and would shell out $8k and not $15k. I am in that group. Maybe CC gets done. The price delta is similar to MM, but the remake demand wouldn't be nearly as strong. They may sell 500. Maybe there's still a nice profit there? Really nice original or restored MB and AFM are in the $9k to $11k range. Maybe 300 buyers each? That's about it for the possible remakes. No other resale is high enough (outside of BBB or other limited run pins) to get enough buyers unless the price drops far below $8k. Doubtful.