Hunnam recently sat down with Yahoo Movies and discussed why he wasn’t coming back to the franchise. In that interview he said,
“They have a very definite schedule that they have to film because of the, you know, politics and business surrounding filmmaking. Sometimes non-creative decisions will dictate how something, you know, unfolds — which seems bass-ackwards, in fact, that we’re making art, or at least aspiring to make art — but yeah, it just ended up being something that unfortunately we couldn’t remedy…”
Basically, it all came down to scheduling. In case you missed it, Hunnam has been busy since his days piloting a giant robot. He helped debut the trailer for the upcoming film King Arthur: Legend Of The Sword. Of course, by the time Pacific Rim 2 begins filming, he’ll be doing other things. In another interview, Guillermo Del Toro talked about not having neither Hunnam nor Rinko Kikuchi return for the second film.
“That’s not entirely true. As a producer I learned not to declare anything about a movie I’m not directing. I can tell you this — a lot of the cast from the first movie is coming back. I leave those communications to Steven DeKnight.”