You'd certainly expect the broadcasters providing the WC coverage to ramp up the advertising as the opening kick-off rolls draws closer.
At present the only time you read about the WC is through the common RL media channels, so it's only targeting those who'd normally be attending. Granted it sounds like it has been quite successful so far, but if they want to get new fans interested then they need to start getting more attention.
Also, is there a conflict of interest for TV companies to advertise this far in advance, as it would mostly get people buying tickets rather than watching on TV?
Is the amount of on-air advertising time something that gets negotiated into the viewing rights between the tournament host and the media?