Source: Ad Age
According to a report on AdAge.com, YouTube will be introducing paid subscriptions for specific channels this spring.
The article states that the cost for the subscriptions would be in the $1 - $5 range, and that the company has already reached out to a small group of channel producers. The article also states that YouTube is looking at possibly charging for content libraries and live events, like pay-per-view.
WWE recently ended several of their weekly YouTube series. While WWE isn't specifically mentioned in the article, it is possible that WWE could be one of the producers that YouTube reached out to, and use their channel as the launch for the WWE Network.