An idea I have had for years, that somehow Outlands and the rest of the Draenor pieces (that we haven't yet visited, like the sea) that float around in the twisting nether would be brought together in a one-time use reforging of the planet. This would be achieved by using the incredible Titan technology, such as those in Pandaria and Northrend. That wasn't my first idea, Titan tech, but for the Earthen Ring to commune with the Draenor Elemental Lords. But maybe a combination of the two ideas would do the trick.
Considering that the Titan tech could literally tear Azeroth apart, they could at leas bring some of Outlands together (might be more than the one continent that we know of). This would in turn deplete Azeroth of its most powerful Titan machinery..