Clayton and Miss Ellie gave it to Bobby in the original - I have to assume in trust other wise they’d have had to drill for oil just to cover the taxes. So, I’d have to guess she changed the beneficiary of the trust to add John Ross - which is maybe why he was in such a hurry to sell it before he “died” - thinking he was going to die. Maybe at that point John Ross becomes sole beneficiary. There’s assumptions that have to made here but they’re reasonable. It’s not reasonable to believe they just gave Bobby what is tens (or more) billions and he didn’t have to drill for oil to pay the enormous gift tax. Of course as it turns out the oil was not part of land any way so he might have been fine, but then once the 3 boys inherited the mineral rights they’d have estate taxes to pay. More complicated then they portray but assumptions certainly make it possible for John Ross to get part of the trust - though it could turn out he has no power as a trustee.