Actually, if Lesnar will continue his career as a MMA fighter; I can see him winning the UFC title. Just wait for him two years atmost and he will be a force to fear.
His size and weight is just overwhelming and its a huge advantage for Lesnar.
If you compare Lesnar with Kimbo, Kimbo is just 240lbs. But lesnar is 295lbs (routine actual weight). Now, if Kimbo has the punching power, well guess what?...Lesnar is still stronger than Kimbo in this.
Lesnar is a pure wrestler, knows how to take his opponents down easily. Now lesnar just needs more fights and experience and he will dominate Kimbo easily.
Im not biased in what im trying to deliever here, its just what I saw and analyzed both fighters each one on his own.
The only thing both are the same at is just that both are aggressive and will always bring pressure and be offensive. Other than that, everything else is for Lesnar's bank.