What if (game crossovers)

Been playing ds3 pretty much exclusively, and every time i wanna play a different game i just get bored and feel the call that the souls games are.

I think the thing i love the most about the souls games is all the customization and the gameplay itself.

So what if there was a game that was a hybrid of dark souls and fallout?

Edit; side thought, could you imagine what dark souls would be like if it were an MMO?