Hollywood actor Robert Downey Jr says the upcoming sequel to Sherlock Holmes will improve on the original’s formula by setting it outside England.

Following the success of the film, there has been no doubt that there will be follow up to the 2009 film.

“Yes, I think we’ll be abroad,” he told MTV Movie News when asked whether there are plans to take Holmes’ show on the road.

Downey Jr then added, “A bit of Paris, a bit of Switzerland by the end, if I’m not mistaken.” The actor playing the British detective also affirmed that he will reprise his role in the sequel, saying “I’m going to do Sherlock 2; it was one of my favourite experiences to date.”

However, he is not sure if Rachel McAdams’ Irene Adler will also return to the second installment.”It’s hard to say. Because Irene Adler only appeared in one of the stories of Doyle’s reservoir of activities. But we’ll find out quickly,” he said.

About the possibility of making it into 3-D movie, Downey Jr said, “It’s hard to say.”

“Certainly, if you don’t do it as an option, then you don’t have that option. If the last six months have shown anything, it’s that audiences like options, and they will take advantage of them. And you’re leaving a bunch of dough on the table if you don’t shoot something in 3-D,” the actor said.

But the 45-year-old actor promised Sherlock Holmes 2 will improve on the original’s formula.

“There’s always (room for improvement); as a matter of fact, that’s the great thing about seeing a film in success,” he claimed.

“With Sherlock, we both had success and the audience responded to it, and we  saw room for improvement.”

Sherlock Holmes follows the adventure of Arthur Conan Doyle’s most famous character and his partner Dr John Watson in their adventure to bring down a new nemesis. The film earned more than $200 million in total.