What would DC have to do to earn this distinction? The only way for him to get in the conversation might be for him to beat Stipe again. DC's final UFC HW resume will be small. So, giving DC this distinction involves a bit of MMA math (which is unreliable given that anything can happen). While DC is one of the best ever and strives to be the greatest, he acknowledges that Cain is the best HW both now and in UFC history. However, he won't fight him. What if Stipe beat Cain in the near future? A win over Cain might be enough to solidify Stipe as UFC HW GOAT (in the eyes of most at least). If DC loses to Brock (doubtful), he can never be remembered as the best UFC HW of all time.