I know similar mods have been made in the past, but this one ought to be much more in-depth. If the Battle for Whiterun is being completed for the Imperials, there will be no change to the ending where Balgruuf gives his speech. If you're completing it for the Stormcloaks however, the final confrontation scene after the battle will be reworked, allowing for you to negotiate between Vignar and Balgruuf. The new dialogue will allow Balgruuf to remain Jarl so long as he pledges allegiance to Ulfric, or Vignar and his court can take over instead, as previously intended. After reporting the victory at Whiterun to either Tullius or Ulfric, a courier will confront you with a letter from the Jarl of Whiterun, which requests your assistance back at the city. Speaking with the Jarl begins a quest to start rebuilding the city. The mission will have you travel to mills to purchase sawn logs and quarried stone for the repairs (Hearthfire installation requirement should be configurable, if possible) and carrying messages and supplies around the city and Skyrim, as well as contributing in smaller ways, such as cutting firewood and donating coin. The quest should not only see the rebuilding of the city after its destruction, but also its improvement - better walls and towers, roads, banners, market stalls, etc. Throughout the quest, residents of Whiterun will be seen in the streets and around the walls, working to clear debris and repair the city. Extra NPCs could added, such as 'Hired Workers', 'Slaves', and such, and progression into repairs and improvement throughout the quest should be visible Following the completion of the repairs, all the residents of Whiterun will be gathered to hear a speech from the Jarl, who will commend the Dragonborn and all the citizens of Whiterun for their hard work and commitment, and then rededicate the city. If Vignar is chosen to become the new Jarl, the quest will act as reinstatement to the position of Thane; if Balgruuf stays, reinstatement will not be required. Since I know next to nothing about creating mods for Skyrim, or any game, really, I don't know how big of a task this mod would be, but I would love to see this come to life. Thanks!