I will see what others think of HOI4 upon release, but tbh, i'm starting to feel that WW2 has been done to death, and we need something new and fresh, like Stellaris.
Well, WW2 is done do death on minor western front; eastern front is different matter. Not to mention strategy games about WW2 in Yugoslavia, resistance in Poland, Winter Ear in Finland, warfare in Burma/Philippines/Indonesia, and of course Chinese front where 1 million Japanese soldiers (and much more Chinese) died.
And then is barren area of eastern front in WW1, balkan front in WW1,ottoman front in WW1, Balkan War, Spanish Civil War, Vietnam-Khmer war, Korean War, Algerian War, Israeli wars, Iran-Iraq war, Afghanistan, Kongolese Civil War, Russian Civil War, Pakistani-Indian wars and few others
Not to mention there was still no good WW2 racing game!