There was a sharp increase in prices between 1993-1999.
Particularly in 1998-1999. SW Death Star Race Game £350, most 12 inch dolls were £350+ each.
Episode 1 was massive. I think you will see the same again.
A lot of the items, especially oddball and boxed vehicles dropped in value after Episode 1.
The same is happening again. I am actually being outbid on oddball items, which is unusual as I use to be the only bidder.
MOCs on eBay are now going for strange prices- some well under value such as the recent Italian 4 packs and some over the top like the trilogos and palitoys.
Cardbacks have especially gone through a massive pay increase.
I think this is just the beginning. Every vintage item will go up in price. (Sell your collection if Mark Hamill is in the trailer- you'll make a killing).
As this links the vintage trilogy to the new trilogy, I think you wont see such a drastic hike and drop in prices like you did 2000-2005.
If the film is good- man- I have no idea.
It could go crazy hype vs an ageing collecting community.