Brock Lesnar And TNA's Status
Source: Wrestling Observer
Despite Kurt Angle playing middle man, Brock Lesnar doesn't seem close to signing with TNA. He's focussed on a deal with UFC and that wouldn't give him much time for wrestling (if he were to train properly) and Dana White UFC president wouldn't want Lesnar at risk from injury in a wrestling ring.
At one time he did mention to Vince that he could work a "Mick Foley" style schedule but he does not have that status.