Please Rest Assured

After everyone's persuasion, I decided not to add any supernatural powers. At most, I would add a few weaker ghosts and monsters that can be dealt with with a gun.

Some people suggested adding science fiction characters, such as those from Marvel. I thought about it, but I still don’t think it’s very good. But I have a very interesting idea. Do you think it is to let Sheldon in the future invent a time machine and take Ron to save it? How about yourself in other time and space?

For example, Sheldon in 2012, Sheldon the day after tomorrow, etc.