To those of you who dont know, the Nerevarine was the main character in Morrowind. He/She could not age and cannot get sick. Would the Nerevarine be capable of stopping the Dragon threat? Maybe he/she could've even stopp the Oblivion crisis. Also the Nerevarine went on an expedition to Akavir and never returned.... So yeah.. that's why He/she is not there in Oblivion/Skyrim
Give me your reasons why.