Back before The Night of the Doctor answered all of our questions, fans could only wonder what events had led to the Eighth Doctor's regeneration. It was widely acknowledged that the Time War was responsible for his untimely demise and in a parallel universe, albeit one that's made entirely of LEGO, it was. In another fan made scene by BentheCreator, Gallifrey is gone and Doctor is all that remains of the Time Lords. You can probably guess what happens next...