Joseph Quinn says the 'Fantastic Four' cast has received "sage advice" from MCU veterans, and calls Robert Downey Jr. "a remarkable actor" ahead of working with him in 'Avengers: Doomsday.'

Avengers: Doomsdayis currently in development, with filming taking place in England. It has allowed Quinn and the rest of the Fantastic Four the opportunity to work alongside some

First Steps introduces the iconic team in a retrofuturistic setting, teasing Doctor Doom's arrival in the MCU. A post-credits scene reveals Doom's interest in Franklin Richards, a powerful child. Robert Downey Jr.