I head rumors that the new nexus will is labeled under code name "Naked"
This phone will be so thin and flexible. They accomplished this by not including a hardshell or case, but something flexible and soft. THink of softshell crab.
Google figured that since 80% of the folks out there use put a case in a case that it would be counter intuitive to to sell a phone with a case.
Battery will be silver soldered on the flexible screen.