Mods I would love to see in Civ6:
Middle Earth (you get different elf, dwarf, human, orc, and even halfling civs)
New Civ: Brotherhood of Nod (Kane as leader) with Military and Religion focus. Unique unit Nod Light Infantry. Unique Building:Hand of Nod (acts like a shrine and Encampment). Also new resource called Tiberium that shows up in the modern age which can be used like uranium and oil.
Natural Disaster: Kaiju Attack. Can be triggered after Nuke attacks.
