I really hope this merge rumor will happen. Recently 5G had a lot of Signature flights canceled as they are not selling and also most of their flights are going to SW. Soon Signature will be flying with SW as they just merge together.
5G and CJ I see the possibility of both of them joining forces with TX as they've been doing flights for the tour operator.
Also 5G maintenance has been training to fix B737, but at the same time don't forget 5G is mainly owned now by Girbalt so if TX wants to buy 5G from Girbalt they will need to spend a lot of money. Also 5G is one of the most expensive charter airline out there second to AT.
There is so much involved in this rumor that is a fifty, fifty chance that might happen