gibbons22

It was a bit of an out there theory but I recall reading as part of the 'Patchface, herald of the apocalypse' theory that the Mother of Mountains could be a volcano. If this is the case, I could see Danny gaining the support of the Dothraki through a combination of religion and shock and awe. If she were to summon (or descend upon them on the back of) Drogon while in the presence of the Khals just as the mountain erupts. At that point either they follow her willingly (unlikely I expect) or she fries the Khals and offers anyone else the chance to challenge her to mounted combat until everyone is kneeling or barbequed.