Some of the Hasbro Star Wars team communicated that the first time they saw the Episode VII incarnation of Luke Skywalker was when they saw THE FORCE AWAKENS in the theater. That lack of knowledge seemed INCREDIBLY deliberate on the part of JJ Abrams or Lucasfilm or Disney. Pick whichever party you want to, but someone made the decision to not give production imagery of Luke to Hasbro.
The next question seems to be WHY? And it boils down to something that JJ Abrams said when they were promoting the movie. Who is Luke Skywalker? Where did Luke go? And why did he disappear? Those questions were really at the heart of the movie. Having Luke Skywalker merchandise available when the licensed merchandise comes to market goes against that overall concept.
And then there are the leaks that happened all during the prequel era. We've seen toy releases that gave away significant plot points during the prequel era, like lost limbs, etc. But a whole person whose existence has become a great mystery? Having product lists, toy imagery, etc, has great potential to spoil the story for everyone, especially in the age of social media.
Now there was the one leaked image of Luke that made it out before TFA was released. But since Hasbro never officially got that image from Lucasfilm, guess what? To Hasbro -that image didn't exist. And if Hasbro did approach Lucasfilm about making a Luke figure based on that image? I suspect that Lucasfilm probably shot it down. In addition to the concept of "Who is Luke Skywalker?" that permeated everything with TFA, it seemed that everyone involved with promoting the film was on the same page on one thing: preserve the theater experience for the viewer and maintain a sense of surprise. And action figures were a lesser consideration. I look at all of that, and I'm okay with not getting a Luke Skywalker action figure in the TFA line.