For some reason, I thought you meant the argument, and not the actual legalization of it.
Yea, I don't think so. I don't think there will be a big enough outcry for it, because some a small minority of people would want it. I think I've heard 10% of people are homosexual. Not all of them want to get married, are are out, but it's a much larger percentage than those who would want to marry multiple people. I would think. That, and there are other obvious issues, ones that you've brought up. So, no, I don't think that's happening.