Marvel’s upcoming movie slate going into 2020 still has a lot of empty spaces with a lot people pointing the finger at the billionaire, playboy philanthropist to set out on a fourth adventure. With Iron Man 3 taking a whopping $1.2 billion at the box office last year, it’s pretty clear why Marvel would be keen for Iron Man 4.

However, Robert Downey Jr.’s contract to play Tony Stark and Iron Man only sets up him up for next year’s Avengers: Age of Ultron and the follow up, Avengers 3, which has put a spanner in the works the possibility of a fourth Iron Man movie.

In an interview with The Hollywood Reporter, Downey Jr. has cryptically spoken out about the chances of another Iron Man film saying, “I’m sure we’ll ride that thing. You’ve got to surf that all the way into shore”.

“I think I was at the forefront of something that was coming into being, and I think it has carried me as much as I have informed it,” he continues. “That’s the healthy way to look at it. It’s so easy to become inflated by the successes, but what they really are are long, strong trends. It’s just another wave.”

Anyone have a clue what he’s talking about?

Avengers: Age of Ultron is out in May 2015.