- The core data for the game is still loaded from the plugin files, as with the original games; however, each game object (record) in the plugins is mapped from Oblivion Engine to Unreal Engine using JSON. This means that the traditional methods of detecting conflicts may not work anymore. When adding new content to the game, the JSON data for this content would need to be inserted.
- The JSON structures for many game objects include additional values that did not exist in the original game, and the purpose of them is currently unclear.
- Any text that is added to the game via plugins seems to show up with an "[NL]" prefix, which is currently thought to mean "Not Localised". Investigations are ongoing to work out how to make mods that don't have this prefix.
- The new Unreal Engine versions of the textures, models, particles and animation files appear to still be linked to the original version in some cases.
- The Level of Detail (LOD) for this game appears to use a completely new system, most likely heavily controlled by the Unreal Engine side of the game.
- The game uses several scripting languages across different systems, including an updated version of OBScript, Unreal Engine Code, and Unreal Engine Blueprints.
- Concerning a possible script extender for the game (equivalent to xOBSE), there is a challenge of the Creation Engine script extender devs being unfamiliar with Unreal Engine and Unreal Engine modding being unfamiliar with Creation Engine script extenders.
- There are some hints within the game code that there may be a Construction Set coming for this game, but that may also simply reference the tools used by the developers.
- On the Xbox Game Pass store, the game states it includes "In-Game Purchases", which could imply the eventual integration of the Bethesda.net paid mods store.
- The Xbox Game Pass of the game came with a lot of extra debug data that is helping with the efforts to reverse engineer it.
- A version of xEdit is in development to support creating plugin files for Oblivion Remastered, but it is currently largely untested and not yet available on Nexus Mods.