just a rumor, i assure you. MMOs come with monthly fees, its the nature of the beast. Plus or otherwise, Nobody's going to be exempt of this.
at comic con, the guy did say that, however he mis spoke, and has now been corrected, here is the corrected statement
"as for the pricing ... a Sony Online Entertainment rep says the guy on the panel misspoke.
Initial subscription fee for PC users is $49.99 per month; for Sony PS3 players, it's $59.99. that comes with a free 30-day subscription.
After that, it will cost PC & PS3 users the same monthly subscription fee, $14.99 per ....
sorry for the confusion."
They haven't actually come out with any pricing comments yet. Some people are also mistaking what was said at comic-con where they asked "If you needed a Playstation Plus subscription to play it" which was replied with "no a PS Plus subscription is not needed". If I had to guess I would say there's a fee around 12-15 a month or it will be apart of the Station Pass.