Will Class Halls Eliminate New Classes?

Hi,

So, I was flying around the Broken Isles just now and a thought popped into my head.Because of class halls, class specific quests, and artifact weapons for Legion, does that eliminate the possibility for Blizzard to include new classes in the future that aren't hero classes (Starting level 110+)?And if they do include hero classes in the future, will those classes be able to quest in Legion zones without having an artifact weapon?Will Blizzard add in a new class hall, quest line, and artifact weapons for each class they add to World of Warcraft?

Please help.

I didn't find the right solution from the Internet.

References:

https://us.battle.net/forums/en/wow/topic/20762287159

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Will Class Halls Eliminate New Classes?