It looks like there might be some new theories about Iron Man 4, including How I Met Your Mother star Cobie Smulders taking on an important role.

'Big Opportunity' About To Happen For Iron Man?

On Friday, Entertainment Weekly posted a story on the ending of Captain America: The Winter Soldier. The article gives a more through explanation of how the film ended with some details on what it could mean for a new Iron Man movie (SPOILERS AHEAD).

Apparently at the end of the new Captain America film, Smulders' character Maria Hill applies for a job with a name that ought to sound familiar- a place known as Stark Industries. Not only does this create some anticipation for what could happen if Iron Man 4 happens, but it also gives some curiosity for the second Avengers movie.

Trevor Slattery Rumors For Iron Man 4?

"Placing Hill close to Tony Stark could mean that Cobie Smulders will have a significant role in Avengers: Age of Ultron- although that film is already so overstuffed that it's equally likely the Marvel producers are putting her in place for Iron Man 4," the site wrote.

The site then added some important information about Iron Man 4 that fans need to still be aware of.

"(No, Iron Man 4 hasn't been officially announced; yes, Iron Man 3 made over a billion dollars; no, that's not the kind of money you walk away from, even if you have to pay for Robert Downey's seventh private island)," the site wrote.

If Iron Man 4 ever happens, then there might be a chance that someone younger than Downey, Jr. could get a part ever since the actor told The Edge that the filmmakers will likely want to start over.