Robert Downey Jr. is best known these days for his work as Tony Stark, aka Iron Man, in the Marvel Cinematic Universe. However, in between gigs as the superhero, Downey Jr. has kickstarted a successful Sherlock Holmes franchise.

Now, after years of delays, the actor has gone on the record to voice his hopes to move forward on a still untitled third involvement.

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While the actor is currently making the promo rounds for Marvel's Avengers: Infinity War, Downey Jr. is currently moving ahead with a full slate of non-Marvel related projects, including The Voyage of Doctor Doolittle, which is currently in production. Talking to Entertainment Weekly, Downey Jr. addressed the challenges he's facing -- admittedly of his own doing -- on Doolittle, while also hinting at what is still to come for him. Along with Perry Mason, which his company is developing for HBO, he's still keen to make Sherlock Holmes 3.

"First of all the missus is front and center with Joe Roth producing Doolittle. I’m having a good time, though I decided to give myself, like, 40 additional challenges, like a Welsh accent — which even Welsh people say is hard to do," Downey said. "Then there’s all this stuff down the pike. We’re looking at another Sherlock Holmes, we’re developing Perry Mason for HBO."

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The last update on Sherlock Holmes 3 was that Warner Bros. had brought in Nicole Perlman (Guardians of the Galaxy), Gary Whitta (Rogue One), Justin Malen (Baywatch), Geneva Dworet-Robertson (Captain Marvel) and Kieran Fitzgerald (Wormwood) to tackle a screenplay for the film. That, of course, was back in 2016, before Robert Downey Jr.’s production company, Team Downey, opted to part ways with Warner Bros. Updates on the project since then have been far and few between, suggesting that while the actor is keen to move forward with the project, it may still be a ways off.

Sherlock Holmes 3 reportedly still has Downey, Jude Law and Guy Ritchie attached. No release date has been announced for the film.