AFAIK, there’s certainly nothing on the drawing board that would be big enough to actually accommodate human experiments. This seems like one of the highest value things NASA could do with ISS.
Voyager Station is a planned microgravity enviroment which plans to be in orbit at 2027. It will likely be a lot cheaper to do those experiments on voyager station then on the ISS.
Voyager Station is a planned microgravity enviroment which plans to be in orbit at 2027. It will likely be a lot cheaper to do those experiments on voyager station then on the ISS.