Pretty sure I read in an interview with someone from Fuji that once they get the current roadmap more or less completed they'd potentially start working on niche lenses like fisheyes - I'll reply if I can find the source later.
Found it pretty quick so editing my post:
http://admiringlight.com/blog/interview-with-fujifilms-torben-hondong/
"I asked Mr. Hondong whether Fuji planned to continue catering to the high end shooter solely, or if they also planned on releasing cheaper, smaller and slower lenses in the same range.
Mr. Hondong noted that Fuji would be doing both. Plans are to fill out the lens lineup fully for both advanced shooters as well as on the consumer level.
I asked if there were plans to add any specialty lenses to the system, such as tilt-shift lenses, fisheye lenses or so on. He stated that the 56mm f/1.2 APD is the first step in a more specialized lens. They’re going to see how the market reacts to the more specialized optics before deciding on expanding in that area, since these specialty lenses are very low volume.
I asked if there were plans to release any long prime lenses, and he stated that there were no plans for that at the moment, but perhaps it would be reexamined when the 2016 roadmap comes out."