Note: This is purely speculation.
So during GC's famous Tinker tweets this past summer, he made the following statements;
https://twitter.com/Ghostcrawler/sta...84467674243072
That line about Lucca from Chrono Trigger is an interesting one. For those who don't know, Chrono Trigger was an old Square game from the 1990s on the Super NES/Famicom that was based on time-travel. Lucca was an inventor who built the time machine that started the entire adventure. Its fascinating that out of all tech-class references, he chose one that had a time-travel slant.
pic:
The game itself:
http://en.wikipedia.org/wiki/Chrono_Trigger
Again, this could mean absolutely nothing. However IF the next Xpac is Warlords of Draenor, AND it deals with time travel, that's a very interesting tweet from GC that could be possibly a clue as to what to expect in the next expansion.
Thoughts?