Oklahoma City has been competive since getting clobbered by the Cavs on Nov. 26. These are the game margins:
L by 2
W by 8
L by 6
L by 9
L by 6
L by 10
L by 7
L by 4
L by 5
L by 10
W by 8
This includes close losses at Orlando, Dallas, and San Antonio.
I expect the Cavs to win, but I wouldn't be surprised if it were close unless the Cavs take the game really seriously from the start.