https://wccftech.com/blizzard-wow-classic-pvp-content/

Blizzard has detailed the WoW Classic PVP content plan following increased community requests for PvP details in World of Warcraft’s vanilla server option.

Last month, the WoW Classic team already announced their plan to release the content in Classic in six phases, starting with the release of Molten Core, Onyxia and Maraudon in Phase 1 on launch. While Blizzard detailed the content release phases, PvP content wasn’t mentioned due to the team still evaluating their options regarding rewards in PvP.