Then you are dealing with speculators and hold the leverage. They cant sell the "block" because they don't own the block.
So it's either what you want or they can sit on their 5/6th of a block, continue to watch their investment fall in value and think of all the other uses their money could have been put to instead of owning land they can't sell or develop.
In other words, you sit in the cat bird seat.
I think you are right. They need my land to package a good sale, and I don't think they want to be partners with me. lol. That's why they are acting so unprofessional, because they are "speculators", not corporate developers.
Thanks for helping me think this through people, just felt overwhelmed, and didn't know how to proceed. Now I have a game plan, instead of swinging in the dark.