How ironic if WWE ended up on TNT. Not that they would want to, because don't the people who own the station now hate wrestling? That's why they couldn't wait to get rid of WCW back in 2001 (which is a huge reason why WCW is dead now.) Why would they want to go there? They have a very good long standing and comfortable relationship with USA Network. They've been on USA ever since 1993, except for exactly five years (September 2000-October 2005) with TNN/Spike, who they said they never felt completely comfortable with for some reason. No reason for them to change really.
And yes, they're currently trying to get the WWE Network launched, but seeing as how the content (wrestling-related stuff only) is pretty limited to an entire network/channel, it doesn't look like it's gonna happen. That's why no one has even picked it up yet.