you've seen a good future where Dravyn stopped villains from taking over the world and had kids of his own... but there is an alternate future where Dravyn actually failed to save the world, Crystal died in his hands... he could not save her and got depressed meanwhile his world is broken... the world broke and have voids that people can fall if they did not step carefully... everything is broken and now everything is worse ever since, his friends are missing... but Dravyn still have hope to make the world better although he could not save it... but he has hope to fix it... to finish his mission, meanwhile Nightmares kept getting worse turning into night terrors, and Night will have to give up his nightmare status to keep himself safe from the dangerous environment Axon(in his universe where Darkrus is not there) saw what happened and instead of feeling the need of vengeance... he feels bad because he knows that Dravyn felt more pain then he did... and then tries to survive, everyone is trying to survive this broken world... and years later... this is the bad future
it's what happens when the Obsidian wakes up which contains a dark god that is capable of destruction only did Dravyn, Hatter, and the God of Destruction