I'm hoping for a total war: Medieval 3. The Attila mod, Medieval Kingdoms (1212) is amazing. Just hope they don't screw it up.
If it had the production system from Hearts of Iron 4 would be pretty cool. I really like that feature.
Other games I would like to see, would be some proper adventure RPG's with a good story, setting and gameplay features. EA and Activision could have had some great titles if they were developed right and allowed to take their time with them. So unless we have companies like CDPR (can't wait for cyberpunk), Warhorse, TaleWorlds, Cloud Imperium to push the envelope here and there I think I would have left gaming behind me a long time ago. (Seems most games are just getting worse and worse every year.)