Dragonflight Alpha added to the Battle.net App Catalog
The Battle.net app catalog was updated in preparation for the upcoming Dragonflight Alpha. This is usually one of the last things to happen before a client is released, so we'll probably see that appear in the next few days.
For comparison, the Shadowlands Alpha catalog update also happened on a Friday (April 3rd, 2020), with the client releasing the Wednesday after (April 8th, 2020) and realms going live one day later (April 9th, 2020).