I've been thinking about this scenario.
You get in contact with a potential employer. You're asked to present concepts and ideas for, let's say a video game.
You make your pitch. A few days later you get a call informing you that you're not needed, or something along these lines.
A year later the game is released. On the promotional material something catches your eye.
What's this? It's the very same concept you presented at your pitch!
Am I just paranoid or do these things actually happen? What can you do in such an event?