This isn't always to WOW Classic Gold say that both cannot release at the identical time, but it might make little feel for Blizzard to cannibalize its own person base via forcing players to select one model of the game over the opposite, and waiting for the maximum hardcore players to move complete in on each is severe.
For years, Blizzard has labored difficult to time gate the content of World of Warcraft so as to hold gamers drip fed simply the right quantity of pastime, so it'd make more feel for Shadowlands to release in December or so, seeing that we still do not have a firm release date other than 2020, after which launch Phase 6 some months later.
This regrettably might mean that Phase five will ultimate for 6 months or greater, and that is a lot of time to be running on such content material, but it is able to be how Blizzard chooses to mmobc.com roll the whole lot out. The different alternative will really be to chunk the bullet and launch both across the equal time as Shadowlands. In any case, The Burning Crusade might be next up.