Forum:Althist Crossovers

So, I've had this idea running around in my head for a while about crossing over two alternate histories and seeing how they affect each other. It's like, 1983: Doomsday meets Great White South, and I want to know if any of the Antarctic countries in GSW have been nuked too.

I only have two questions: first, is such an althist crossover a valid topic on this wiki, and so how, and second, are there any other people here that have ideas like this?