Today I watched The Founder (Which details the history of Mcdonalds)
Mcdonalds is so ubiquitous and pervasive, yet I never knew the story behind its creation and growth. I never realized that the founding Mcdonald's brothers were pushed out of the business and Ray Kroc took the ball an ran with it. The whole situation was strong drama and This a great watch.
The brothers were bought out for 1 million each and despite being told (non contractually) that they would receive royalties (which would have been in the 100's of millions), they were never paid a cent according to the movie.
The take away from the movie for me is that if you have a great idea, be careful who you trust and protect yourself as much as possible, because there are plenty out there ready to take advantage of you.