So anyone familiar with DnD knows there are outer planes, realms of the gods if you will.
The inner elemental planes are already present in the game.
Would be cool to get a chance to actually explore the afterlife and realms of deities like Elune or the Light.
A step forward with this was the Halls of Valor with Odyn in it, but floating about in the sky is not really a good place for an afterlife unless the Halls are in another dimension.
So yeah let's explore different worlds of many faiths, maybe even get taken there after our characters die and be judged in the Shadowlands to enter them.