Well since most here think Tyson will lose I guess I have to be the Great Dissenter.
Tyson KO's Lewis in 3rd Round.
Lewis, a notoriously slow starter will be overrun by a ferocious but rusty Tyson.
Lewis will come out and "look" warmed up in the first 30 seconds but will slow down after he learns Tyson is too wound up to control.
There will be a takedown in the first round (within the first two minutes), LOTS of hitting on the break, hitting after the bell and a minor melee will insue at the end of the first round when Lewis gives Tyson a "FU" glare after the bell.
The second round will see Tyson lunging more and Lewis grappling and holding on - still trying to crankstart his engine. Tyson will eat lots of jabs coming in but be held excessively by Lewis.
The third round will find Lewis opening up more and becoming more aggressive, which will lead to his demise. He won't be prepared for the power of Tyson and will get caught with stunning blow coming in. He'll drop fast and get up fast, stagger up, grapple and hold on but he'll go down again for good. End.