Personally, I feel that if/when the game comes back, we should start with just one server. Having multiple instances of a zone wouldn't be so bad, but I doubt we'll see nearly the population the game had previously.
Currently, there are already a few problems with the population. First, getting the word out to all the previous players is nigh impossible without any form of listing of all accounts. I doubt NCSoft would give access to that kind of thing. Second, it's an old game now, and there just aren't enough of us old-school gamers. Third, there are already fully operation illegal servers running for this game. Those will detract from the main population. Finally, there are no more major content updates. I mean, if the negotiations are for just the right to host the game, and not to also acquire the software to create updates, then how will a handful of people create updates, starting from scratch on the software front, and keep up with a company that had nearly a hundred developers? We might see small bug fixes or minor changes, but I doubt anything big is even possible now.
While month to month payments are a good idea to keep less desirable players out, I just don't think a game in this condition can survive like that. I'd personally recommend a F2P system, minus the premium stuff. I mean, as it stands, it's rather unreasonable to ask a lot of money from people like myself who already sunk several hundred dollars into the game, just so we can get back the very same things we already purchased. I might be dumb enough to purchase it all again, but I doubt there are that many fanatics lol. Heck, we even have to start from scratch in earning vet rewards. Maybe a trade-off could be made. For example, you have to repurchase the costume packs and such, and you can get those various item packs or purchase things like rename and respec tokens, but we all start with full vet rewards, or at least earn them faster than before. I dunno, it just really is going to be tough on whomever brings this game back to make it profitable enough. At least, it will be until the word spreads.
On that note, if this game ever returns, I'm going to do a full Let's Play series on YouTube for it. That'll be fun for me, probably for a number of viewers as well, and it'll be my way to getting the word out that the game is back from the dead. Since currently the only Let's Play/Walkthrough/Playthrough videos for CoH are only up to level 20 at the highest, a full LP would also be a first for this game. *sigh* Of course, that assumes that NCSoft gets their act together and stops holding out on earning free money from a dead MMO.