How can we connect the fifth installment with the previous games in the series?

There will also be campaigns about life after the Armageddon. So don't worry. The question is, how do you feel about the existing lore for the fifth game? Should we adapt our campaigns to fit it, or simply rewrite them from scratch? In other words, if we base it on the established lore, then the Dark Elves appeared after the Armageddon, after a conflict with the other Elves. This can be created using the fifth game's engine. Or would it be better to rewrite everything, ignoring the Nival Interactive campaigns?