I must be in the minority by thinking the 295lb Mario Williams will be the 3rd down lineman and not the rush OLB. I see him in the exact role as Watt. He's the 3rd down lineman with his hand in the dirt that in certain formations may be asked to drop back - however this won't be by our choice this will because the offense exploits Mario and we'll have to make an adjustment. His job should be to rush the passer on every passing down, help with the inside rush, and contain the outside run.
I see Spikes and Brown in the middle with Bradham and Hughes as the OLB's. Hughes is the rush OLB and when they switch to the 4-3 it will look very similar to last year.