A Fantasy / Heavy Sci-Fi MMORPG that isn't pay2win. Ideally, it would be like planetside2 but with several higher-tier strategic models-- each nation or faction controls say, a city and has to fight for resources and facilities. More resources and research = unlock better vehicles and equipment etc.
Standard progression would be say, infantry/engineer to assault/grenadier, pilot/Mechanic. Eventually there would be entire clans and divisions of say, armoured vehicles, artillery, aircraft, bombers, AAA etc... Also Cybernetic enhancement, you could eventually be a supersoldier capable of flight that could turn such a battle around in a moment.
Also it would have the damage mechanics of dwarf fort. Any bodyparts blown away are either lost forever or must be replaced with cybernetic augmentations. Enemies can pick up such parts and fashion them into jewellery, e.g a necklace of teeth.
Edit: Also a real-life holographic SHMUP like one of those lame racing games you see in arcades. I wanna climb into a cockpit, throw a coin in and blow shit away. Hell, give it the option to make your own bullet patterns and multiplayer. I can easily see a VR headset for a home version.