From a calmer read of the notes, it very much sounds like they just want 100% security in that the move won't be vetoed by the society.
Why spend millions for nothing.
They want temporary rights to make it happen but, if they can get full rights then they want them.
Temporary rights is still scary. They could do whatever they please in that window but I doubt they would shoot themselves in the foot.
I imagine if they get full rights then they have a much better exit strategy and a more solid foundation.
Temporary rights would be build and move. They would likely seperate all asset's from the club. This is so if they do need an exit plan or hit a wall of non profit, then can keep the premesis and facilities or sell them.
I don't think a merger or that is anywhere near the cards or in their plans but should the planets align, and it happened, they can say we told you so.