I have been thinking about this a lot lately.
Dynamic, MVP, Westside, Prodigy, Prodiscus, Legacy are all new comers (to pumping out large amounts of disc molds) and some will get weeded out.
Dynamic has a big midwest following and I think they will easily hang on for the year.
MVP saved themeslves from the gateway curse (people thinking all they can make are putters)
Prodigy has the big names and a unique plastic, but they have had a few hiccups; The massive release of illegal discs and the UV quality control issues. They are so hyped that they will easily last the year.
I feel that Westside has done a lot of great things lately, but I think they will eventually become Lat 64 molds.
Prodiscus had some issues with molds not matching when changing plastics and even though I love the Jokeri, I do not think they will make it in the long run in the United States without a huge new release.
Legacy will survive, they have a large street team that keeps their discs selling.
Vibram will live since they are the only rubber discs
Gateway can live forever on just Wizards and Magics. I think the Warlock and Voodoo will make a comeback.
Millenium and discmania will live with Innova's support
I predict DGA will suprise people this year. I hope the breaker is huge for them.
Quest will hang on using a different name and pawning inferior crap on PIAS.
Lightning's fan base is getting too old to play
So in recap, I think ABC will be the first casualty, followed by Prodiscus, Lightning, Quest and Westside, but not for atleast 2-3 years.