How will the failure of net neutrality effect online gaming? Will I have to pay more to play world of warcraft?

Probably not. If your ISP is so evil as to try to extort money from someone, it will most likely be Blizzard, or the company that makes the game you want to play. And if Blizzard don't comply, your ISP might try to drive away Blizzard's profits by slowing down everyone's connection to their servers. So no, if this repeal comes into force, you probably won't be affected monetarily.

So instead of costing me more, it'll just make me more likely to get ganked then when playing online. It is probably a good thing I don't have Comcast any more, greedy comcastards...