I've been waiting for the balloon to go up for so long I barely get excited at the possibility anymore.
Back in the old days it was the Soviets going to nuke everyone and invade everyone, then the threat eventually becomes something new and cooler and such.
In the end I think those who survive best will be those who have a tight knit, prepared community, but low key and mostly peaceful setup, and aren't all about killing and pillaging and dominating others. A whole lot of would be warlords, militia leaders, new government types, new society types, do as we say or die types are going to spend a lot of time back and forth slaughtering each other and being slaughtered.
It isn't popular to say but a WHOLE LOT of all these "militia" and "prepper" types and "survivalist" types and "restoration government" types are actually probably worse than what we have right now. Most (Including MANY on here) are of the brutalize, enslave, plunder and dominate bent.
It's not going to be fun times.
Most folks don't have a plan for year 2 and onward...
If the balloon goes up in a big way anytime, year 3 will see only the meek, industrious and self-sufficient left around for the most part, probably ruled over by whatever tyrant was left standing.