Billionaire Elon Musk partially inspired the on-screen portrayal of Tony Stark by actor Robert Downey Jr. The SpaceX founder was even featured in a cameo role in the 2010 film "Iron Man 2." ...

So this isn’t just a variant of Tony Stark using the infamous Doom name, armor, and costume. Nor will they just handwave away the fact that Doom looks just like the most famous name in the MCU.

Robert Downey Jr. lent his star power, and alter-ego Tony Stark, to make a child's dream of a new arm come true. Downey partnered with Albert Manero.