As a part of the pre-launch event, Blizzard has given 16 streamers early access to the new expansion, as well as a bunch of Mega Bundles to giveaway. Additionally, by simply watching any of their channels, you can win a channel sub – so if you have a favorite streamer that you aren’t subbing, you should head to their channel for a chance to win.
Streams have already started (at 9 AM PT / 17:00 CET) and they will last… well, for however, each streamer wants, actually. So probably at least a few hours.
Here’s a full list of participating streamers: