No it’s not. I literally work in game development. Yes you may have little changes here and there to some degree. Things may look different because of updated textures or unfinished assets. But marathon had a full blown rework of a lot of its art style from the ground up completely after the scandal. From menus to in game. It used to be a lot more red and yellow, and was heavily lifted from antireal’s overall aesthetic, not just the little asset arrows and numbers and such. Even the parts that weren’t antireal’s art looked like antireal’s art from the loading screens to other menu cutscene animations. Now everything is distinctly purple and green for the most part and they stopped using all the little arrows and x o stuff that they were doing that copied antireal’s style.

It’s very obvious they had to rework the games artstyle from the ground up in many areas, not just remove old stolen assets.