If you were my client, my advice to you would be this: you've had a miscommunication between well-meaning people. A novice producer on an low-budget project found a nice, keen, talented photographer who was willing to help them out for a very reduced rate. No one ever turned their mind ugliness of a money-thick, over-lawyered business. Assumptions were probably made on both sides. Unfortunately, they were at cross-purposes.
I can't imagine that these images are worth a damn thing to you long-term. As a photographer, I share your slight sense of violation at giving up all-rights. It's like selling your child. Usually, as indeed is also the case with the sale of children, you get very well paid for your troubles.
But in this case, there's no gold.
If you rear-up and get all rightsy about your photos, they may effectively be of no use to the producers. They will be worse off than if they never hired you. You will go into the "Problem/Nightmare/Asshole" column in their mental files. Fairly or not. And, the strong words that will pass will likely cause you to file them similarly in your rolodex. You probably won't even get your $200. And if you do, you'll resent it.
Life is long. Have a beer with them and explain that you've had a misunderstanding. Then do them a solid and give them the images. Life is long. Karma matters.
There may be a lot of facts I don't know that would change my view, but that is my basic take. If I were your lawyer, I would send you a bill for this advice, in the amount of, ironically, about $200 for the half-hour phone call. On the bottom of the bill, I would stroke through the $200 and write "paid in full by a lesson learned
". Because life is long. Fight when it matters. Be nice the other 98% of the time.
Good luck whatever you decide to do!
- N.