Mortal Kombat II was supposed to come out last year . Then, at a certain point, Warner Bros. looked at the film and realized two things. One, the film had the potential to be a big summer blockbuster, and two, they wanted to start working on another one . Yes, the studio was so happy with Mortal Kombat II that it brought back the film’s writer, Jeremy Slater, to write Mortal Kombat III long before Part II’s release, and work is well underway. “I finished a really early draft that was kind of a throw-everything-at-the-wall draft and see what sticks, which is kind of what my process was on part two as well,” Slater told io9 over video chat this week. “And then we have a great creative brain trust between me, Dave Neustadter at New Line, and producer Todd Garner, and the three of us really kind of put our heads together and kind of look at like, ‘Okay, well, what’s good about this?'” But, Slater explained, all of that was happening as Mortal Kombat II was still awaiting release.…