I've been following this as well and my understanding is this. 600 and SX-70 films will be made (not positive on image/spectra size). The 4x5 machines are all gone, be it peel apart or sheet. This is not because the IP people didn't want them, it's because Petters in his infinite wisdom in his ponzi scheme had decreed ALL film cease production, and then, upon the closing of the plants, all the machines were to be destroyed and sold for scrap. The IP people were a weekend away from losing the Holland plant with all the integral films and even then it took a lot of pushing to keep the machines. They were also some how able to save the 8x10 machine which was in MA I believe. They have stated that they their primary goal is getting the integral films back out there, which is what they're concentrating on, they've got the B&W at a point where they're saying they'll have it ready beginning next year, since integral B&W is only 4 layers of materials as opposed to the 13 for color. That is why the color film(s) will be coming out roughly mid year.
Now, in the next stage of their plan I've been told they are developing their own integral camera as well, and that hopefully based off this, they will be able to get the 8x10 back up and running as well. They are also opening actual retail locations in places. They are already in Berlin, have been for a while, and I know they're working on one here in NYC. So from what I can summize, 500, type 80, izone, and 4x5 sheet are all dead at this moment, meaning whatever is out there is what's out there. I didn't mention 100 or 4x5 pack because Fuji makes those, but as for Polaroid brand, they are.
The only other format I haven't mentioned is the 20x24 cameras. Now those were run in house, but Polaroid sold off all the remaining supplies so that now 20x24 Studios here in NYC claim what they say is 3-4 years of supply in the negatives, positives, and have the means of making reagent pods as to not expire. This operation is still getting up and running though the studio is fully functional and you can go in and shoot anytime. Now those cameras aren't for sale, but it's still a Polaroid format. The people at 20x24 have expressed that they are going to further investigate a possible future manufacturer once they are more setup in their own operations with the reagent and pods etc. Likely candidates being Fuji and Harman of course.
So in the end, integral films are safe. Also remember these are NOT Polaroid films nor formulations, these will be new films set up by The IP in a way that they can keep functioning since Polaroid made so much of their own materials. The Polaroid announcement is more for news and saying that they will be making a camera again, but they aren't making the films.
As to all the other formats....8x10 seems to be safe to return hopefully in the next year, 20x24 has at least a little time left if not longer, but the real loss is all the 4x5 and type 100 films. Now there is still a fair bit out there which you can go buy up, but unless Polaroid puts in the money, or perhaps if IP has enough success and go for it, or on a really long shot they get Fuji to start producing more of these films under either IP or Polaroid branding, one if not both of them will have to rebuild new machines to make those films again.
Personally I'm getting as much as I can, I already have most formats covered (sx-70, 600, 100, 4x5 sheet and pack), I just need a 405 back to use 100 on my 4x5 converted 110, and I'm trying to get the 8x10 gear even though I don't even have an 8x10 camera yet, I actually just bought the processor for $2.75 off eBay the other day. I haven't gotten it yet, hopefully it works fine, and I can get my hands on a film holder or two, then I'll just need the camera and some film. Either way I'm buying a fridge full of 100 and 4x5 sheet and gonna try to get what I can of 8x10....best of luck to everyone else...unless you're bidding against me.