EXPLORE TWO FABLED KINGDOMS – As a champion of the Horde, travel to Zandalar to persuade the trolls to lend their naval might to the war effort. As a defender of the Alliance, sail to the seafaring kingdom of Kul Tiras, home of Jaina Proudmoore, and rally its inhabitants to fight for your cause. Once you’ve successfully recruited one of these proud kingdoms to your faction, infiltrate the enemy’s newly claimed territory.
Void elf - "Many have sought to harness the corruptive magic of the Void. Most who tried have fallen into madness. Determined to use this power for the good of Azeroth, Alleria Windrunner is the first mortal to succeed at defying the shadow's whispers. Coming to the aid of a group of her kin who nearly gave in to the darkness, Alleria has vowed to train these Void Elves to control the shadows within them and pledge their newfound powers to the Alliance."
Today's events set the stage for major changes in the game, including the expansion pre-patch, which will include all the game systems, cosmetic and other changes for the new expansion - basically, everything but the content in the expansion's new zones. There has been no official announcement of the prepatch launch date, but if I were a betting woman, I'd say July 10 looks awfully likely. [Edit: All right, or the 17th. But plan for the worst, people.]
In Battle for Azeroth, the fall of the Burning Legion has set off a series of disastrous incidents that reignites the furious rivalry between the noble Alliance and the mighty Horde. As a new age of warfare begins, Azeroth’s heroes must set out on a harrowing journey in search of new allies, race to claim the world’s mightiest resources to turn the tides of war, and fight on several fronts to determine which side will lead Azeroth into its uncertain future.
There's a few profession crafted pets in BfA on the horizon - Battle for Azeroth Tailoring is getting a Hot Air Balloon style pet, and BfA Alchemy looks to be getting a brand new Transmute Meat to Pet. There are some mount buff consumables from both BfA Leatherworking in the form of a mount barding, and Blacksmithing in Battle for Azeroth will be able to craft Stirrups and Hoofplates to increase mount speed and allow you to interact with things while mounted.