How much longer will the Empire last? With the war in Skyrim ongoing, no clear victor determined by Bethesda, and the assassination of Titus Mede II it seems that it is dissolving with no rightful claimants. Considering the origin of the Emperor's assassination was the Elder Council it seems that even in Cyrodill this institution is at odds with itself even as the legions are squaring off with rebels with the understanding that if they do not behave then the Thalmor will get them, heh.
Unfortunately there isn't enough going on in High Rock to determine with any accuracy what the Bretons will do, but should the Legions pull out of Skyrim to handle the succession of heirs as they did in Morrowind it is definite that the Stormcloaks would gain the upper hand. If the Imperials do not focus their attention on the White Gold Tower to legitimize whatever heir the Council chooses then results could be catastrophic. The outcome for Skyrim seems obvious. Such strong and independent neighbors in Skyrim and Hammerfall may lead the Bretons down the road of similar thinking, as it seems the weakest state in all of Tamriel is Cyrodill.
In an earlier post I examined that a revolution was necessary for the Empire to persevere. As the title suggests, perhaps the best solution for Cyrodill, High Rock, and Skyrim is dissolution of the ancient institution - the Empire, and a confederation of states acting according to one principle; the betterment of mankind.