The Wrestling Observer Newsletter from Dave Meltzer, by some seen as the source on the Internet for accurate wrestling news, is reporting that chances currently are 50/50 on whether Kevin Nash and Christian Cage will resign with TNA. The major factor in whether they'll resign or not is how much WWE is interested in hiring them.
When it comes down to Kevin Nash, he is giving TNA reps the impression that WWE also wants him back to play the bodyguard of Shawn Michaels, to counteract Cade in Jericho's corner.
Nash also states however that he has very limited capacity when it comes to what he can do in the ring, and the TNA schedule is exactly right for him, giving him enough time to rest up between matches.
Christian Cage didn't leave in the best way when he jumped ship to TNA a few years back, but time heals all wounds and both Cage and WWE consider that water under the bridge. Cage has a feeling that this time he could get more main event exposure on WWE because of the drug testing.
Now wrestlers are thoroughly tested, pure muscle mass doesn't determine whether you're being pushed or not that much.