Archie's mastery of cut and paste does not make him any less an idiot.
Here's the mistake you are making. You've got a case that goes your way that you think disposes of all the issues.
It does not.
But even if it did, all you have in Echo-Hawk's determination is an agency holding that can be challenged in court.
I could give you a time estimate for processes within the agency, then the District Court, the Circuit Court of Appeals, and if the Supremes decided to hear it or not.
The result would be a low to high time estimate but I'm telling you that even the low estimate is likely outside your life expectancy and mine.
During this time, both the CN and the UKB will be bleeding money for lawyers and transcripts, not to mention lobbyists to try to get Congress to mess with it.
I see no advantage to the Cherokee people in having this feud. I also see no advantage to the Cherokee people in having more than one government in Oklahoma located on the same real estate. I further see no advantage to the Cherokee people in submitting the question of what the Cherokee government should look like to US courts rather than deciding it among ourselves.