There will be several parallels when it comes to things like resource management and warfare, and the Wonders system also appears to be the same as in Civ 6, at least on a fundamental level.

Both Civ 5 and Civ 6 have hit higher peak concurrent player ... next castle Rebellion CEO says Evil Genius 3 could happen but wonders 'what else could we do with it other than a base-building ...