I think I get it where is the misunderstanding. You seem to look at this as guarantees, while people generally tend to consider it plans that might or might be delivered. I think it will be very hard to persuade people for legal action because when a project flops people just move to the next project but just in case you manage to somehow pull this off let us know, however IMO things will probably end like with most failed crypto projects - no new people coming in, ICO investors moving to new projects, devs slowly closing the project.