More information about Timewalker dungeons is coming out - almost certainly the Bronze Dragonflight will show up in some capacity to introduce them.
Could this mean that the Infinite Dragonflight will appear as well? Maybe they'll be drawn to current events by Kairoz's involvement?
Maybe the next patch, the next raid, will involve an attack by the Infinite Dragonflight. Some conflux of alternate timelines being drawn to AU Draenor. Who knows, maybe completing Timewalker dungeons will reveal a few more hints.