There's gonna be a focus character for each of the ten books, like how Kaladin was the focus character for a Way of Kings (showing his backstory). Brandon said that we've already met each of the viewpoint characters, and that he's not sure if the next book is going to be a Dalinar book or a Shallan book. He also said that by the end of the epilogue, we've met all of the characters, which means that Talenel is going to be one of them. He also mentioned in some interview that he'll probably have two Kaladin books, and that Szeth will get a book. This means that the following viewpoints are confirmed:
Kaladin x2
Dalinar
Shallan
Szeth
Talenel
That leaves four more. My guesses would be the following:
Adolin
Jasnah
After that, I'm not so sure. Here are the ones that I think would be possible:
Renarin
Elhokar
Wit/Hoid
Axies the Collector
Sadeas
Naeaverirenaifenvae whatever the crap the Queen's name is
Renarin and Elhokar are probably the most likely of the semi-likely, which would mean the following viewpoints:
Kaladin x2
Dalinar
Shallan
Szeth
Talenel
Adolin
Jasnah
Renarin
Elhokar
What do you guys think? Which characters are you most looking forward to / least looking forward to?