Blizzard plans to make old content relevant again with Shadowlands Season 4.
Shadowlands – Delay is Good
Shadowlands releasing later this year
WoW Shadowlands: What We’re Most Looking Forward To
15 Things You Should Know About WoW: Shadowlands
World of Warcraft’s 15th Anniversary Event
World of Warcraft: Shadowlands Confirmed At Blizzcon
World of Warcraft Leak – Bolvar Art Print, Next Expansion Title