With the news that EQ2 is opening a free to play server next month, it seems to me that the same concept could easily be utilized for both EQ1 and Vanguard. Sony states that the idea is "to grow the gaming community through new players. The free adventure service allows new players to experience more quality content and increased participation than the previously offered 14-day trial."
Basically the free server would allow you to level up in the older content but deny you free access to certain races, classes, and newer content without either switching to a subscription model or paying a la carte for those features.
If SOE has the resources to implement this for EQ2, the only thing stopping them from doing this with EQ or VG is the time and money to code the F2P server's different ruleset. I think that this would be an outstanding way to bring new people into all of these games and hope that they have plans to expand this idea to (all of) their other titles.
We know that they mentioned adding a new server after the recent server merges... might it be a Free server?