He noted that the supposed "Starfield 2.0" update is not a sequel and is not aimed at instantly fixing criticism, but will be a serious technical overhaul. Starfield is supposedly a testing ground for new systems that will later be used in other games.
According to Corden, Microsoft's Advanced Technology Group is directly involved in the work, including specialists from The Coalition studio, who are familiar with Unreal Engine. Kate Rayner, who has worked with Unreal-based pipelines, is also involved in the project.
Instead of a complete transition to Unreal Engine, some features and workflows are being studied and integrated with adaptation into the Creation Engine. This will preserve Bethesda's own technologies while gaining the benefits of Unreal Engine, including optimizations and new rendering methods.
The improved engine is expected to form the basis of Fallout 5 and The Elder Scrolls VI. The information is based on rumors and industry sources, and there have been no official announcements yet.