Is there a way to, or has anyone thought to develop a mod that makes some of the Zombies Easter Eggs Solo-able?

I've wanted to complete all of the easter eggs, but can't do some of them solo. I think it would be cool if there was a mod where some of the code is adjusted to make the Ascension, Shangri-La, and Shadows Egg solo-able. Does anyone think there's a chance of this being able to be made?