‘Iron Man 4’ potential villains are explored and include The Mandarin, Crimson Dynamo and Titanium Man. Mary Jane Watson makes a surprising crossover for the ‘Invincible Iron Man’ series and is rumored to appear on the next sequel as well. It may feature a romantic angle between her and Tony Stark.

Iron Man 4 is yet to be given the green light by Marvel and aside from director Shane Black's statement that Robert Downey Jr will be back to don the Iron Man suit, no official details have been revealed yet. However, it is rumored that he might be replaced by Ty Simpkins. Plot rumors also indicate that he might fight againts the real Mandarin if the film gets pushed through.

Iron Man 4 could be released during the Marvel phase 3 and the plot could be close to the plot of the forthcoming Invincible Iron Man. If the new claims will be proved to be true, a relatioship could be developed for Tony Stark and Spider-Man's ex, Mary Jane.

Since the announcement of the fourth phase of the "Iron Man" movie, further details have been kept concealed. So, different speculations sprout and filled the internet regarding the "Iron Man 4".

‘Iron Man 4’ leading man Robert Downey Jr. will reprise his role as the titular billionaire-playboy superhero. The highly popular and successful actor is often compared to his on-screen superhero counterpart. The series' rejected old logos have also been shared by freelance creative director Fede Ponce.

‘Iron Man 4’ may take plot hints from the new ‘Invincible Iron Man’ comics. This move is said to reboot the solo title series for the character. It was also revealed that Mary Jane Watson has made a surprising crossover from the ‘Spider-Man’ series to team-up with Tony Stark a.k.a. Iron Man.

Iron Man star Robert Downey Jr. tweets as Iron Man on Labor Day weekend. The rumored Iron Man 4 is said to be delayed due to the world's highest paid actor's steep dues.

‘Iron Man 4’ is an upcoming superhero movie in the Marvel Cinematic Universe (MCU). Leading man Robert Downey Jr., who plays the titular Tony Stark a.k.a. Iron Man, was advised by ‘The Judge’ co-star Robert Duvall not to give up his role to someone else. Downey Jr. currently commands $80 million in total film earnings.

Robert Downey Jr is likely to continue his reign as the highest paid actor internationally as Director Shane Black said he's sure that he will return for Iron Man 4. The ongoing discussion about Downey Jr's pay is the alleged cause of the film's delay.

‘Iron Man 4’ star Robert Downey Jr. is said to return as Tony Stark a.k.a. Iron Man but not before a raise in his paycheck. His character’s Bleeding Edge Armor is seen in the Marvel crossover film ‘Captain America: Civil War’.