That takes place after Garrosh has been laid to rest and before the next expansion.
What idea do you want to come up with? It can serious, it can be heartwarming, it can even be funny. It can be whatever. Just come up with an idea.
My idea involves the Alliance, the Horde, and the other neutral factions(Ex: The Lorewalkers, Tillers, Shado-Pan, Earthen Ring, Avengers of Hyjal, Kirin Tor, Argent Crusade, Knights of the Ebon Blade, Cenarion Expedition, Shattrah) all have a huge feast in celebration of the end of the Alliance-Horde war with Varian and Thrall signing a truce.
However, during the feast, Nazgrim decides to egg Admiral Taylor on the face with a deviled egg. Taylor tries to pay him back by attempting to throw a pie in his face. Taran Zhu stops him and criticizes him for trying to do that, then pulls a fast one by chucking Taylor in the back with the same pie. Furious, Taylor grabs a piece of food and throws at Taran Zhu, only for the Lord of the Shado Pan to dodge the object where it hits Varian Wrynn.
Varian decided to pay back Taylor by throwing food in his face. Which unfortunately hits Jaina. Jaina takes a few pieces of food and throws it at Varian, only to hit Thrall, Aggra, Lorethmar Theron and others, and sooner or later, everyone starts chucking food at each other in a big food fight. Taran Zhu then comments to himself "Way to go you idiot. You just caused a massive civil war. Oh your ancestors are bowing their heads in shame over this" as he fends off against his own men in a fight over consumables.