It sounds like Kozuka will continue at least past this season, though he will be 28 by the time the next Olympics come around. He also postponed a hip surgery to prepare for these Olympics, and if he decides on the surgery after this season, who knows if he will recover enough to contend in the future. Oda I think has said he wouldn't continue past this season.
Fair or not, this whole situation is heartbreaking for both Kozuka and Oda. What's done is done though, and I hope that things will change after Sochi that will allow at least one (if not both) of them to compete at Worlds.
I'm glad that Daisuke will still go to the Olympics, but I am heartbroken for Taka & Nobu. I wish there were more than 3 spots for the amazing Japanese men. I understand that Nobu has retired, so therefore we won't see him @ 4CC, etc. If a spot opens up for Worlds, I hope Taka gets to compete there.