AAA acquisition was done to expand into the Mexico market and have a boots on the ground presence there year round and try to slow AEW’s growth.
There’s no point in buying TNA or GCW. WWE already has the US market on lockdown. Owning TNA isn’t going to put any dent at all into AEW until they get a far more significant media rights deal. GCW is an indie that’s never going to be more than an indie. They’ll be damn lucky if they can ever get to current TNA status or peak ROH status because they can’t stop shooting themselves in the foot whenever they get momentum.
AEW will still get talent from those two companies rather they have a working relationship with WWE or not. Like look they just got Josh Alexander and Mike Bailey from there, for example, and that was after Alexander previously rejected AEW.
It’s cheaper for WWE to just send talent there to get reps than it is to run the companies themselves even if they ran it the most cost effective way possible.
Only reason I could see any potential interest in buying TNA is if that would make it easier for TNA to lockdown those prime international TV rights WWE gave up to move all their international rights to Netflix. Having that WWE name attached to it would be a better selling point than TNA. But would it really make financial sense to own TNA just to prevent AEW from getting those media deals?
That wouldn't make much sense to do as TNA's value would be higher than what WWE projects it to be if they were to get them. Plus, as we see so far, TNA's growth isn't effecting AEW's growth (it never was going to, but it could actually hurt WWE more than anything) which you are correct in and the partnership they have with WWE only has a few years left, so that means if they continue to grow and not stagnate before it ends, it'll go more in TNA's favor which is something WWE don't want deep down.
TNA already land some international deals with them being on Eurosport India last year (same network that AEW is on) and Sportsnet 360 in Canada, the latter people assumed that WWE helped in, but apparently TNA hired someone years ago forgot his name that has years of experience working in SN360 so it's a case of networking. And judging by the people the company has been hiring for the past year whom has experience working in either ABC or CBS, it's safe to assume what network the company is trying to land on in the states.
All and all, as much as fans what the company to be a feeder to WWE, I think most of us know that TNA will be fine and won't be brought out.