I think that prediction is a fool's errand. There are too many variables unknown to really make an educated guess even.
I think the current trend is the bible belt is getting more conservative relative to the rest of the country and educated people are getting more liberal relative to the rest of the country. Then, demographically, whites are a lower percentage of the population pretty much everywhere. But, in my opinion those just forecast to the Democrats winning most Presidential elections in the next couple of decades.
But, a toss-up map might be:
