Here is what you should have done: Told them that you will sign the documents to close the acquisition. If he wants, he can sue later. In truth, he won't sue for a few reasons: a) it is the right thing to allow the acquisition to happen, and b) he doesn't want the truth to come out that he blocked the sale solely because he un-rightfully wanted a bigger chunk of the company.
It is my strong opinion that him going dark with communication was a negotiating tactic. He was stretching you over a barrel and then fucking you. You telling him you will (and then doing it) to sign the legal documents is the way to unblock that situation. That is what happened to the other person who had a VC do this.
You need to absolutely document that this VC did this in TheFunded.com. There needs to be consequences to VCs. You would want your VCs in the future to be self-policed by TheFunded against doing something like this.
It is my strong opinion that him going dark with communication was a negotiating tactic. He was stretching you over a barrel and then fucking you. You telling him you will (and then doing it) to sign the legal documents is the way to unblock that situation. That is what happened to the other person who had a VC do this.
You need to absolutely document that this VC did this in TheFunded.com. There needs to be consequences to VCs. You would want your VCs in the future to be self-policed by TheFunded against doing something like this.