First off, I'm very glad that Ric Flair will be there when the Horsemen are inducted into the HOF. It's an honor well deserved of the greatest stable in professional wrestling history. The two are one in the same. To not have Flair there would make it a farce, IMHO.
Secondly, to borrow from The Rock... IT DOESN'T MATTER who Flair works for right now! This is not about Flair's current job. This is about the work he and the others did as a member of the Horsemen. Is the HOF political? Yes indeed it us. Vince runs the damned thing, so he basically gets to put whoever he wants into the hall. If it were an independently run hall, none of this would matter. But you can't deny the fact that the Horsemen belong in the hall (along with many others who have yet to get in, but that's another rant for another time).
I don't think Flair mentions TNA at all in his speech... nor should he... if he does speak (if he doesn't speak, that's just a travesty). TNA has nothing to do with the Horsemen. I think Flair's smart enough to respect that and focus the event on the Horsemen. Flair definitely mentions NWA and WCW, because that's where the Horsemen ran and, of course, WWE owns the rights to WCW, so that will be displayed without a doubt.
Personally, I'm a little ticked that it's not the ORIGINAL Horsemen (Flair, Arn, Tully, Ole and JJ) going in, but Barry Windham was a great performer and deserves to be honored as well. I understand that a lot of other great wrestlers have been Horsemen, and they'll get each their respective due someday (well, except for Ole... and Benoit... maybe Sting and Luger... doubtful on Sid... possibly Pillman... and, please to God, not Mongo. That's yet another rant for another time right there). I'm just a fan of the original group and its' impact on the industry. I think Ole should be a part of it, but I understand why he's not and never will be. So it goes...