Please note that I am making this post because Sly feels that I have something against Paul London, therefore I am writing this in order to quell such a though process.
Paul London has the look to make it in TNA. He has toned up his body from his last stint here and has his own style to go along with that. Being in WWE, especially as one half of the longest reigning tag team champions ever on the Smackdown brand. This will add to his booking power as well as his ability to command a decent amount on the indy circuit, which will help him to reestablish his grass roots.
Paul London has the skill to make it in TNA. He's not afraid of the camera and, with a little tweaking, he could easily adjust to the TNA six sided ring. This could make him look faster in the ring as well, with the rings being smaller, lengthwise, than the WWE rings that he flew across. Paul London seems to fit the mold of the other cruiserweight/X-division stars on the roster. He's young, he;s fearless, and he's not hard to deal with.
And now the part that will keep him out of TNA.
Much like his good buddy Shannon Moore, Paul London was once in TNA. After seeing the promise in this young star and being ready to become serious as a promotion, TNA put a serious contract offer on the table. Knowing that WWE had some minor interest in signing him, London took the offer from TNA and went to WWE to show then that he was a wanted commodity. This moved WWE to counter with a bigger offer, thusly screwing TNA and spitting in their face. This would leave a bad taste in anybody's mouth, and it has. Therefore, and I'm not saying it would be a cold day in hell, London and Moore's chances of getting into TNA are about equal. And that equality is pretty low when it comes after a release, which means that TNA can leave you to rot in your own self made bed. And London made his own bed. Whether or not TNA leaves him to lie in it remains to be seen, but I don't think that they will come knocking at his door any time soon.