Seriously. So many plotholes, man.
There were goblins on Draenor. How?
How did we get back to Azeroth?
Are MU Azeroth and MU Draenor permanently connected?
If we're permanently connected, why aren't the Draenei forces of Draenor fighting alongside us on Argus?
What happened to AU Archimonde? If there's only one Archimonde and Kil'Jaedin, how are there two Velens?
Is there an AU Argus?