A new build has been released onto the Warlords of Draenor alpha servers. The servers are not yet available for play by testers, so any changes in available content are currently unknown. However, dataminers are already hard at work. The current build includes numerous class changes, glyph changes, and myriad similar updates.
The build also appears to include numerous scenarios relating to old dungeons. For example, an Utgarde Pinnacle scenario with a straightforward objective: defeat the bosses of Utgarde Pinnacle. As we're unable to playtest at the moment, the implementation of these scenarios is unknown. It's possible content from previous expansions will scale up with us as scenarios.
Followers for the Alliance garrison appear in the latest build, too. Follower: Vindicator Onaala, among others, indicate progress on the Alliance side of things, if not necessarily an imminent testing of Alliance content.