What a chaotic scenario if this happens at the convention. Cruz and Rubio would be livid to see the nomination go to someone who hasn't even been running, and rightfully so.
Worse still, it probably destroys the party and pretty easily hands the election to the suddenly stable democrats. But then again, you may also have Trump and Bloomberg running as independents. A potential constitutional crisis could be just around the corner.
Actually, this could be quite entertaining.