We’ll probably find someday distant from here that this so called speed of light limit will be found out to be just a ceiling, the box top of our particular dimension housing, essentially an illusion, which we are simply unable to perceive beyond. So, what could lie over there? Indeed. What could it be?
We get hints all the time though, stuff in this article for example. And who didn’t know that the LHC would ultimately ask more questions than give any answers. Though in science these more questions are answers.