I can definitely see them rolling up with UD Paladin in the future, I’m hoping current story developments with the Forsaken and Kaldorei means that they will give them to both of us since they’ve been teased in lore for quite some time on both ends of the spectrum.
UD Druid may be a bit trickier. I think they’d need to do a bit of lore finessing for that to ‘fit’, but I can’t see it being too far fetched with recent additions to different types of Druidic magic outside the ‘norm’ of Cenarion druidism. If they ever acknowledge that Darkfallen Druids now exist in canon with the new customization, I can see that being a pretty good way to segue that in. I would love to see what forms they come up with!
My current wish list of class race combos is Dwarf Druid, NE/UD Paladin and BE Druid. Mostly Dwarf Druid though, cause I would switch mains immediately. (Bearded Moonkin? Are you kidding me? )
NE and UD Paladin also have a certain ‘je ne sais quoi’ in terms of lore, if they implemented either of them I’d actually want to play a Paladin for once.