I know I'm likely not the ideal target audience for the question as I am someone who enjoys the environment, lore, and setting of Diablo more than the gameplay.. but I would really like to see a Diablo game that is either a RPG such as Skyrim or a survival open world game such as Conan Exiles and Ark. If a Diablo 4 comes out akin to D3 and D2 I'll play it briefly but the other two I would play continuously and buy all the DLC / expansions for.