I didn't see an announcement from Blizzard, but it appears you can now buy the Battle Chest, Legion and Battle for Azeroth for only US59.99 - was US89.99 just a few days ago. EU price is EU49.99 (don't know what it was recently but i think that is a drop as well).

https://us.shop.battle.net/en-us/fam...ld-of-warcraft
https://eu.shop.battle.net/en-us/fam...ld-of-warcraft

Note - this only includes a single 110 boost per purchase (i know some sales previously included a 100 and 110).