Those pre-TPP cases are nothing compared to the future combined scope of TPP (Pacific), TTIP (Europe) and RCEP (China, Korea, India, and other Asian countries).
Never say there is nothing you can do. Tell other people about ISDS. Share the videos [1][2][3][4].
Jon Oliver's video [4] about the Philip Morris tobacco ISDS lawsuit against Australia (for brown paper packaging) caused such an outcry that TPP negotiators were forced to exclude the entire tobacco industry from ISDS. This is the first time such an industry-specific carve-out has appeared in a trade agreement.
[1] https://youtube.com/watch?v=M9ZFDpuiFUs
[2] https://youtube.com/watch?v=M4-mlGRPmkU