Molten Man is a Marvel brick-built figure who will be released in 2019.
In the comics, Mark Raxton, an Oscorp Industries scientist who worked as the lab assistant of Spencer Smythe. When Raxton tried to steal an experimental new liquid metallic alloy developed by them for the Spider-Slayers to sell it for his own profit, a fight ensued and Raxton spilled the liquid over himself, becoming Molten Man.
Marvel Cinematic Universe
Molten Man was an illusion created and controlled by Quentin Beck, representing the element of fire.