This is assuming there will still be a tna by january. Things seem to be going from bad to worse for them. I know theyve mentioned many times that they wont sell to wwe, but it may be their best option at this point. If they keep waiting and then are forced to sell to wwe as their only remaining option, they really wony get much out of the deal.
The likelihood of TNA "dying" anytime soon is pointless, one of the positives if they are now owned in part by a company that can give them TV coverage so until they severely hemorrhage more money they will be around.
As for their deal with Challenge, when they started the channel was only available through paid services, during their time on the channel it became a freeview channel and freeview then became the only way to watch TV, meaning they were effectively in every house in the UK that had a TV, there is no way to move up from that type of coverage beyond getting a deal with a more noticable channel, and unless they strike a deal with UKTV and get on Dave (that is seriously the name of a TV channel here) or even better one of the big 5 channels (although it will either be Channel 5 or Five) they are going to be screwed.