And after all you in the plot created by you made all necessary preconditions for possibility to the player to take a place of the Emperor. So, if you will make addition for game where the player becomes an Emperor is will be logical completion of game.
Here preconditions in order that to the player to become the Emperor.
1. The existing Emperor isn't a dragon, and consequently also the lawful governor. In difference from the hero of game who is a dragon.
2. The empire fell into decay thanks to Tit's actions (signing of the shameful world, Hammerfell's exit from structure of the Empire and a ban on worship Talos). Its popularity among all sectors of society is low.
3. Revolt in Skyrim is caused by a ban on worship Talos and intervention of enemies in Skyrim's affairs.
4. On hearings, the part of an award of blades survived and waits for the dragon. Blades it is possible to enter into game, as allies who should help to take the protagonist of game the Empire throne.
Why the player should become an Emperor?
1. The protagonist - the dragon who has won Alduin. The one whom wants to become any Nord. Having become the Emperor, the hero will stop all mutinies in Skyrim's.
2. Hammerfel more doesn't trust the Empire after Tit's treachery. The protagonist, having received a crown, can return the power over Hammerfell.
After that the protagonist should restore honoring of Talas (it will stop any excitements in the Empire) and to declare war Talmora.
Here it will be the real end of the game what should be.
Now my offer on addition realization.
1. Passing of this addition will be possible after the player killed Alduin. Thus the player shouldn't enter on this or that party in civil war.
2. After the player will kill Alduin, it will be found by one of an award of Blades which will give it coordinates of an arrangement of the survived blades and will suggest to find for them, plainly without speaking about value of this meeting.
3. At a meeting with Blades the player learns that he should become an Emperor and to it will give a task to pass on all cities of Skyrims on purpose to incline governors of these cities on the party. Exceptions will make Solitude and Vindhelm.
Whiterun becomes the capital of resistance of the new Emperor. All other cities can join the player if it wins an arrangement of governors.
The quantity of armies will depend on number of the cities which have sworn on fidelity the player Emperor in final fights and level of complexity of these fights. In all cities, oath on fidelity to the player, should be destroyed Talmors.
4. The player with the new army storms Vindhelm. The deadly duel between Ulfrik and the protagonist becomes a result of this fight.
5. After performance of the previous quest Tit Mid will arrive with an additional army in Skayrim and will begin Vaytran's siege. The player with the new army should reflect this siege. After success, Tit's army should depart in Solitude.
6. The protagonist reforms an army and Solitude storms. Storm will be limited on time during which, the army of the protagonist should achieve a certain success in fight (for example, a capture and deduction of a certain place in the city). After achievement of the necessary result in fight, the army of the opponent betrays Tit and comes over to the side of the main player.
7. Conclusion. It is necessary to create a separate location of the capital of Sirodiil, similar to plans Daedric.
The player drives to the Imperial city and passes crowning in the former Temple Uniform. After crowning the player moves to the Hall of Council of the Tower of White gold where representatives of all countries of Tamriel will be brought together. Here the Player declares the war beginning Talmor and restoration of Talos, as God. And there should be an Empire reconciliation to Hammerfell. Hammerfell's entry into Empire structure becomes which result.
