I do not keep up regularly with the forum but occasionally check in. I am a board certified oil and gas attorney, including title issues and lease termination issues, and have had the Texas Supreme Court "case of the year (per our atty gossip sheet newspaper, "Texas Lawyer") one year in the past 20, and in another year, a top 10 "most watched" oil and gas and title case at the Supreme Court, and have argued before the Supreme Court on another case that was later voted case of the year for that year on the question of whether particular oil and gas leases have terminated.
I have read the string on this lease situation, and unfortunately, there is a lot of information being shared that is just flat wrong on various legal issues, application of various legal principles, etc.. Too much to respond to to take the time now (and I am right in the middle of working on another title and lease ownership case involving whether certain lease rights have continued or not) involving some leases in West Texas.
But to shorten up this discussion for the moment, the owners of the executive rights cannot afford to sit and "wait" to see what happens. There are generally most always time limits running as we speak on protecting rights, recovering proceeds of production for various causes of action, etc., and the burdens have been continually shifted over the past 10-20 years to landowner mineral owners to proactively seek out and protect their rights, find out relevant information from sources such as the Railroad Commission, county records etc.. (Chalk that one up to alleged "tort reform", and cases decided by Supreme Court judges who champion that "cause", which, even though I often work for oil companies, and sometimes landowners, has by most experienced oil and gas attorneys I know, been considered an excuse to favor larger oil companies in court cases, even when they are clearly in the wrong, sometimes purposely or intentionally. We now have some situations where as a practically matter, landowner mineral owners face an almost impossible task sometimes to find out the real information. And last year, believe it or not, the Texas Supreme Court conceded in an opinion in BP v Marshall, that the oil company had committed fraud in lying to the landowner about whether the company had actually drilled a well in time to keep an old lease going after its primary term, but despite that fact, the mineral owner lessors waited too long to sue (and were held to have an extremely difficult burden to check various obscure Railroad Commission records that would likely require hiring technical oil and gas personnel that of course mainly work for oil companies, to ferret out the lies being told to them by the oil company about the conduct of their operations. You can read what the Supreme Court said in the case about what records were "available" and "should have" been checked, etc..
Anyway, you really need to have an in depth conversation with a knowledgeable oil and gas and title attorney who also has litigation experience either directly or within his firm, so that you figure out what your rights are, the potential or likely defenses (that the Supreme Court now sometimes allows) by which the oil company may be able to stay out there holding the lease even though it may have terminated sometime in the past, etc.. And there are various technical requirements that the oil companies must meet under various limitations statutes in order to win on that basis, despite the fact they may have been in possession of the leases for various periods of time (we have a 3 year statute - almost never applies, 5 year statute - often not applicable 10 year and two 25 year statutes, all with different requirements. I have litigated all of them up to the Supreme Court, but I am not the only one of course.)
For a separate example of another case (and yes, my cases got tied up with this one also), see Neel v HECI, in which an 86 year old guy (if I remember correctly), in a nursing home, lost large amounts of royalty, because an oil company had a lease on his land, and another oil company was illegally drilling under the land and taking the oil (slant hole illegal well case). The oil company on the nursing home guy's land went to the Railroad Commission to get the illegal well shut in, obtained millions in damages from lost stolen production, did not inform the lessor in the nursing home or his reps about the Railroad Commission hearings or results, and kept all the money, including his royalty share under their lease with him. Austin Court of Appeals ruled for the lessor landowner to get his back royalty, but the Supreme Court reversed, and said he waited "just a little too long", and even though it might be "unfair" in a particular case (i.e., in that one), the great principle of "tort reform" meant we have to rule against all these types of cases to avoid these "frivolous" lawsuits, etc.. That's my political comment on it, but what the Supreme Court actually said was that, despite our State Constitution provision which basically says someone damaged should have a reasonable time to sue after discovering their damage injury (and still not sure how the 86 year old guy ever even found out about the illegal well, since there was nothing on the surface to show it was happening, even if he could have left the nursing home to go check it out far away from civilization), the "policy" for limiting these inconvenient landowner mineral owner claims meant that all mineral owners should basically automatically be aware of anything the oil company does on or under the land in its operations (even as in the case last year when the oil company lied and covered it up), so the mineral owner does not need any "extra" time to find out his rights and injuries before the particular limitations statutes cut off his rights to sue.
That's all the time I have right now, and there is so much more to say. Not sure I will have any idea if there is anyone who actually reads this or responds. Hope it helps all of you to be careful about what you take as "truth" about any analysis of your legal rights and title and ownership situations, especially under our more difficult Texas law. There is a reason we have "6 Flags over Texas" amusement parks, since all those different govts have affected our oil and gas rights historically, in some really unusual ways, and that is why giving real and meaningful opinions about these issues, and who will win in particular circumstances (which matter very much to the process) is never easy or totally a foregone conclusion.