Class campaigns

Hello,
Will the class campaigns persist through next season as well or will there be new ones available?
Asking because I got all of them before the next season release announcement and I thought I would have time to run through them all but now I’m more concerned with farming lvl 99.
I don’t know if i have enough time to get 99 and complete all the campaigns, and was wondering what would happen to them even though I purchased them but did not complete theme before the next season.