I think future game development in the metaverse actually will be mainly open source and community driven. Imagine if you will a DAO that players of the universe can interact with and basically vote on new features that will be added to the game world. Rather than waiting for a centralized developer to patch and update the game they want, players will pool assets together in a sort of tax that helps fund future game development. Pair that with a Retroactive funding and other cooperative mechanisms and you will be providing incentives for player themselves to build out the game that they want to see.
It would almost be like building a town in the real world, but this is in the digital world.