#1 Brock Lesnar vs Fedor Emelianenko

Just thinking about this fight gives me goosebumps. Brock Lesnar is without a doubt by far the biggest star USA has ever produced in the sport of MMA. A former Heavyweight Champion, Lesnar brings unparalleled charisma combined with high-level wrestling and power in the octagon and is a real test for any Heavyweight in the world.
On the other hand, widely regarded as the greatest Heavyweight ever, Fedor Emelianenko is without a doubt the most decorated Heavyweight Champion of all time. Having won multiple titles in every promotion he ever competed, Fedor's stardom is in no way inferior to Lesnar with Fedor being the biggest Russian MMA star of all time. All due respect to Khabib, the lightweight phenom's popularity is a mere shadow of his Heavyweight counterpart.
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A classic wrestler vs striker matchup, Lesnar vs Fedor will pit the entire nation of USA and Russia at odds when their biggest stars battle for ultimate glory. The fight can go either way. Fedor can knock anyone out with his elite striking and Lesnar is more than capable of dominating anyone on the mat. This heavyweight showdown will sell out any arena or stadium in the world and will without a doubt be the biggest super-fight of all times.
To those of you who're thinking why I haven't mentioned Daniel Cormier vs Ryan Bader in this list, it is because though both of them are Champions currently, I don't think that fight will be competitive. I am of the opinion that Bader has nothing to offer in a fight against DC and he doesn't bring anything to the table that DC has not faced before. DC is far better than Bader in every aspect of the game and this fight will not excite a lot of fans purely because DC is miles ahead of Bader skill wise and it will not be a competitive contest.