Is lucha still shown on Spanish / mexican channels like Gala and what not? I haven't watched wrestling in YEARS but used to be a huge fan. Not sure what alternatives there are to WWE / TNA these days.
Hmm...I don't really have any details on those.
I thought CMLL shows on one of those Spanish channels, but I'm not totally sure.
As for other alternatives on TV...
-Lucha Underground: Probably already mentioned a few times in this thread, but it's pretty awesome. Shows on El Rey.
You can probably find Season 1 out on the Interwebs someplace and Season 2 is coming next month. Highly recommended.
-Ring of Honor: Whether it shows in your area varies. They got some pretty good wresting even though their production team kinda sucks.
-NJPW: The only thing showing in the US are select matches on AXS! These are older matches generally, but most of 'em are pretty good/entertaining.
Pretty sure they also have a streaming service too, which gives you access to a ton of their stuff.
Beyond that, there's lots of smaller/indie promotions floating around out there, though other members here could give you more details on those.