With director Tarsem Singh’s new film Immortals opening this weekend, Collider has been overrun with exclusive interviews with the filmmakers and cast over the past few days.  For those not familiar with Immortals (watch the trailer and clips), the film centers on Theseus (Henry Cavill), a mortal who teams up with the Greek gods in order to defeat the power-hungry King Hyperion (Mickey Rourke).  The film also stars Freida Pinto, Luke Evans, Isabel Lucas, Joseph Morgan, Kellan Lutz, and Stephen Dorff.During my interview with producer Gianni Nunnari, we spoke about the challenge of getting the project made, filming in Montreal, the practical sets, how much things changed while filming, and what's up with Frank Miller's Ronin.  In addition, Nunnari talked about the young Julius Caesar film he's developing with Mark Canton called Emperor that's based on a four-book series.  Hit the jump to watch.Gianni Nunnari Time Index

• :15 Talks about being secretive about the project when talking to Steve at the Saturn awards a few years ago.
• 2:14 How difficult it was to get the greenlight for Immortals. It was as difficult as 300. Talks about the start-stop-start process of getting the go-ahead to make the movie. There were financial difficulties, disagreements about shooting locations, bringing the budget down, etc.
• 4:42 Talks about specific difficulties they encountered, and finally settling on Montreal as a shooting location. Tarsem actually stayed there after Immortals wrapped and shot his Snow White film Mirror Mirror directly afterwards.
• 6:20 How did they settle on the balance of practical vs. CGI effects? Says it comes down to preparation. They planned everything out beforehand in pre-production.
• 8:01 How much did things change onset during filming? Not much actually changed during filming.
• 9:20 Update on Ronin. Says it’s owned by Warner Bros., and as good as it is it’s very difficult to translate to film. Also says a lot of things from the graphic novel have already been taken and used in other people’s films.
• 10:16 Talks about Emperor, the young Julius Caesar film. Says it’s based on a four-book series and is a young fresh version of who Julius Caesar was.
• 11:02 Will it rely more on practical effects or CGI? Says it depends on finding the right balance, and they’re in the process of working on it so he doesn’t have a definitive answer.