Idea for 5A Finale (Spoilers)

This is inspired by some of the behind the scenes photos I saw of what looks like the 5A finale.

Wouldn’t it be cool if the only wayget rid of all the Dark Ones possibility released by the dagger and Excalibur being reattached is to send them off to Hades/Underworld or enlist Hades help? It would be great to kill two birds with one stone: get rid of these Dark Ones and if Emma dies, then retrieve her (and Cora, and anyone else long dead).

Just thinking outloud.