That it's ongoing means fuck all for its success. Post-SL retcons the Jailer's failed with 3 (three) LKs, in Ner'zhul, Arthas and Bolvar, failing to meaningfully influence any of them. It's why he bothers with Sylvanas in the first place. She'd be dead in Orgrimmar in this scenario and all the competing forces involved subsist on souls and so don't allow anyone to go to hell. The Legion being able to complete its Dark Pantheon plan means Sargeras just claims Azeroth on his own, foiling the Bald Man's plan even if the Dreadlords still contrive a scenario to get Argus killed. The Bald Man's plan is impossible in the event of either a Legion or Old God win prior.