I was listening to the story about fleet in words of radiance and fleet dies after running past the shin mountains. Fleet then gets swept up into the storm. My theory is that kaladin dies and becomes something else like a cognitive shadow or something. Thies theory is also in the thread about kaladin taking up the shard honor. We know at the end of book 4 kaladin is being sent to shinovar to try to heal the heralds and restart the oathpact. He will die in shinovar.