Well, based on the press release and the promo CBS just put out, I’d say Danny doesn’t die, but is permanently injured by Mrs. Wo Fat. Both he and Steve (radiation poisoning and/or liver) decide to retire for health reasons. Since Peter Lenkov said they didn’t really change the script after getting canceled, I suspect Five-0 won’t be disbanded but will be shown to be continuing on, sort of a glimpse into the planned season 11 soft reboot that will not, now, be happening.