Some rumors claim that the FP100C that Fuji has been selling was the last batch anyway, and whatever is left in stock anywhere is all that remains. Consequently, prices have shot up from the $8.99/pack that I paid last year, to over $32.00 on some sites. I have about 4 packs left, so I will use what I have for special projects, and that will be it for me. Likewise, prices for pack film cameras will tumble.
Will another company take over production the way the Impossible Project did? I wouldn't hold my breath. It's a niche market. Fuji is making a ton of money on its Instax film. They have the market cornered there. The newest pack-film cameras are 15 years old or so, and the film represents a small percentage of sales.
It is ironic that the announcement from Fuji came on the anniversary of Edwin Land's death - March 1, 1991.