Glaciers have moved quicker than Daenerys. At this rate, global warming has more chance of burning up King's Landing than Drogon & Co. and to make matters worse, Daenerys have fallen all the way back down to being taken captive by the Dothraki. It's a kick in the face for those who're desperate to see Daenerys fulfil her potential (all of us) unless the Dothraki are the key to invading Westeros. Regardless of the Khalasar's motives, Season 6 absolutely MUST see Daenerys make progress in her bid for Westeros. She doesn't even have to reach the continent yet, but she just needs to formulate plans on how to do so. If Daenerys ends another season without any forward progress, there won't be enough time left in the overall series to justify years of hype.