This is an interesting question. At the rate Roman is going, currently 576 days, his world title reign may wind up being longer than Kazuchika Okada's IWGP Heavyweight Championship reign of 720 days. Okada's reign is widely considered by those who watched it to be the best world title reign of the modern era. With it looking possibly, if not probable, that Roman's reign might wind up being longer, we have to ask two questions.

1) Is there a single match in Roman's reign that is better than the worst match in Okada's reign?
2) If Roman matches or passes Okada at 720 days, will Roman have had the WORST title reign of the modern era?