User blog comment:Adsper/All Possible Mobs/@comment-36.78.53.180-20180702073030/@comment-35476439-20180702111423

I hope the animal they chose will be Megatherium. It'll be another cenozoic mammal, and it's the best representative for the giant ground sloths in my opinion.

Plus even if we are wrong, and it turns out none of these 3 are the final mob for the update, who's to say that this is the only time they will ever add "mega mobs"? Maybe the developers will add other "mega mobs" in future updates.