I can only speculate, but the council wouldn't allow the club to use Endeavour 2&3 for redevelopment as it was sold to the club for $2 to be used as sporting fields, but they can't stop the club selling that land. The new owner wouldn't have the same moral dilemma with council on how and why the land was acquired, it would be a purely commercial transaction.
I think you will find Cronulla Caringbah are moving out to Wanda or whatever they are going to call the new development's sporting fields This will be a non issue.