This is partially correct - franchise systems can choose whether to make an Item 19 Financial Performance Representation in the FDD or not -- if they do the financial info is restricted to what is stated in the FDD and if they do not, they cannot make any statement. Either way, the FTC does limit what can be disclosed. So, unless franchisee "profit" is stated in Item 19, it would be a violation of the FTC Rule to providedthe information separately.
While forum selection clauses are difficult to overcome, you are in one of the BEST states to give it a shot. NJ courts tend to protect NJ-based franchisees more than other states on this score. Many times the outcome is dependent on whether you end up in state court versus federal court. But, you need to find a NJ lawyer who is a member of the American Bar Association's Forum on Franchising - these lawyers stay on top of issues like this.
Ohio is an employment at will state - this means you can be fired for no particular reason or for any reason. Unless your termination involved some form of discrimination (racial, disability, age, gender, worker's comp claim) or a whistle-blower situation, you have no claim.
Because of your disability, you have certain rights under the Americans With Disabilities Act - you may not be terminated due to your disability if you can perform your job with a "reasonable accommodation" - which it sounds like you have been doing for years. You may want to consult further with an employment lawyer.
It appears that you have consulted the FTC Compliance Guide - "does not apply to spin-offs, affiliates, or subsidiaries" - the real issue is what is a "spin-off" ? - this is not a defined legal term and the FTC has not defined this term in the FTC Rule. But, I believe your "conversion" could certainly be perceived as a spin-off and would caution against proceeding without all Audited statements. There a lot of great franchise lawyers in Dallas! You should consult one of them. Good luck.
You are entitled to privacy regarding your health issues and if a future termination or reduction in schedule is related to your cancer treatments or condition you are protected by the American with Disabilities Act and perhaps related federal and state laws. These are complicated cases and all facts are important and legal guidance along the way is helpful.