Experimental stuff

[Tiranica-bloodsail-buccaneers]

Dunno about the beta access but yes, if you pre-purchase TWW you get a 3 day early access to the game.

Edit:

Yeah, Beta included if you purchased Epic Edition.

The War Within Beta Test Begins June 5!

[The War Within Beta Test Begins June 5!] The World of Warcraft®: The War Within™ beta test begins June 5! Over the course of the test, we’ll be inviting community veterans, press, fansites, friends, and family to check out the upcoming expansion and give us feedback. Players who purchase or who upgrade to the Epic Edition of The War Within will also gain immediate access to the beta and will be able to gain a minimum three-day early access to the expansion. View Full Article