All of the previous responses are 100% true, but to answer your question, the latest rumors about flagship Nokia phones are that there will be one now called the Nokia Catwalk, which is supposed to be made of aluminum for a lighter, premium build quality. Also, there is supposed to be another phone now called the Nokia EOS, which is supposed to be a Lumia-running phone with an excellent camera, perhaps the 41 mega pixel sensor used for the Nokia 808.

On this forum, most would agree that the next true Nokia flagship will come from the company Jolla, the Nokia spin off company formed largely from the ex-Nokians who produced the Nokia N9 and N950. Jolla has a phone due for release later this year running its new Sailfish OS, which you can search for on this forum.