First I want to say thank you to all the responders. I appreciate you taking the time to give your input.

I called the AA RTW desk and they confirmed I will not have any trouble as it is "clearly noted" in my record that AA cancelled the flight and it was an involuntary reschedule.

I pressed and asked if BA would be able to see this info (BA is the last INT segment). The agent said yes and there would be zero issue for me.

So half of me feels better and the other half is now 100% convinced I will have a problem because the RTW promised there would not be one. Murphy's law and travel seem to be best friends.

thanks again for the help