the Solid ground and pound that you mentioned can be argued by his performances against Randy, Mir 1 and Mir 2
In addition, his submissions skills would not be needed as most heavyweights are not BJJ black belts.
Furthermore, He was able to take Cain down however, Cain is very elusive and a decorated wrestler where he has been able to get back to his feet quickly. This fight is dependent on Lesnars top control and if his wrestlign is 'that good'
Note: When Lesnar won the NCAA title, it was a weaker division than when Cain won.
In addition, his submissions skills would not be needed as most heavyweights are not BJJ black belts.
Furthermore, He was able to take Cain down however, Cain is very elusive and a decorated wrestler where he has been able to get back to his feet quickly. This fight is dependent on Lesnars top control and if his wrestlign is 'that good'
Note: When Lesnar won the NCAA title, it was a weaker division than when Cain won.