Previz for Oculus Rift scifi short film

I'm planning on making a scifi short film for the Oculus Rift and am trying to find a suitable program that will allow me to previs the entire project so I can present an edited version of the story for potential funders. Naturally, traditional storyboarding won't really work for the 360 X 180 FOV.

I'm hoping that Source Filmmaker or Crytek's Cinebox would be some options but I'm having a hard time finding clear info if it's possible / what the workflow would be.

Any ideas? Huge thanks in advance!!