Blizzard is laughing so hard. Their plan is working. Make everyone think they've come up with this horrible idea for an expansion, so that everyone will watch Blizzcon. Then, they announce something SO AMAZING, it blows everyone's heads off. Literally. The developers are not going to make some stupid half-arse alternate timeline time travel expansion about EVEN MORE ORCS.
Please people, stop feeding the troll, wait until Friday, and then enjoy how awesome the TRUE ideas for the next expansion truly are.