I see the AVF, also, as being a "cross" vs. thread, as well.
Strictly comic vs. comic would stay in the CVF. Movie characters versus movie characters would stay in the MVF, etc.
About nonfiction vs.: those should stay in the GDF where they have been made. When dealing with history, historians, and politics, that's really best suited for the GDF. There have been no problems with the placement, in the past, so why should it start mattering, right? Besides, so few non-fiction vs. threads get made that it will amount to very little in the grand-scheme of things: those threads will account for less than 1% of the threads IF non-fiction matches were created.
I suspect that the forum activity for the AVF will be able to be mapped to the Gartner Hype Cycle: except this hype cycle realized in less than 6 months rather than a few years. During the initial "zerg rush" of threads and ideas, we will see lots of inappropriate threads created. Once the excitement wears off, we should see a sag in activity and it will start to slowly build back up and reach a more stable level that is quite manageable. I suspect that activity will be somewhere between the MVF and CVF, once things settle.
There is an X-Factor: it could slowly increase in activity as time goes by, after the initial hype. This growth could also be partially external as we are already creating threads on KMC that cannot be found anywhere else on the internet.
AVF Social thread?
What about, just for fun, an annual "AVF" awards thread as voted on by the posters and mods? (Best Thread matchup, funniest matchup, best army v. army matchup, largest unintentional spite thread, best AVF post rebuttal of the year, etc. That would be fun, I think.)