Don’t know if this will be seen, but the invasion and quest line for SL will not be in the pre-patch until closer to SL launch.
” And once we get closer to Shadowlands’ release, you’ll be called upon to defend Azeroth against a resurgence of the Scourge during our pre-launch event.”
Exiles Reach, level squish, customizations, and re-vamped leveling will be in Oct 13’s pre-patch.
