1. Not sensing defensive pressure.
He'll get sacked by Charles Johnson because he won't see it coming.
2. An INT
He'll make a dumb throw into coverage because he's inexperienced and not good at reading NFL defenses, one of the major reasons he hasn't started yet. So he'll get picked off.
3. Several touchdown passes, to Mike Thomas, Lewis (if he starts), and Jones-Drew
Panthers defense is allowing a lot of points and not always to experienced offenses (Kevin Kolb w/ his Cardinals). I expect Blaine to have some good red-zone shots that the Panthers won't be expecting or capable of defending.
4. He'll make some awesome throws.
From time to time, we'll be like "WOW! THAT's why we drafted him!"