I give it a deserving 9.5*

Ben Kingsley returns in this wonderful One-Shot, and he doesn't disappoint. The 'twist' in Iron Man 3 had the fandom divided, some people liking Trevor Slattery and the others hating him, but this One-Shot gives the answer to how the hate was misdirected after all. Before I go let me tell you this wasn't a work of appeasement, or Marvel tracking back their footsteps, though they tease it a little when Trevor says, "Once an actor plays a part for too long he becomes the character...", or something. On the contrary the One-Shot establishes the Ten-Rings connection from the first Iron Man and shows that there is yet more depth to uncover in Iron Man's own side story. TLDR: It's an awesome ride for MCU and Iron Man movie fans, though if you are just a regular movie goer, chances are that you won't get what all the fuss is about.