I would like a remake with an expansion built in. Remake is different than a remaster. Remake is having the original game and adding some additional game features. Better graphics and enhanced optimization while important, are secondary. I can see the civ4 remake combines some elements of the civ5/6 games. The civ6 religion pantheons/beliefs are worthy to be an expansion. They could also add Natural Wonders, City-States and new Civs and leaders to existing Civs. They can incorporate the art assets from Civ4 Colonization (some mods already included them). Add 2 new leader traits to accommodate the new unique Civs and leaders.