IMO: The blitz shouldn't be any more of an issue than with other teams and QBs especially with Philly's poor DBs being put on an island if they blitz. The issue will be if Philly can get to him with 4 guys. That would break down the entire flow of the Offense and make it very hard for us to have success passing the ball and perhaps even lead to some turnovers.
I think they will get to him with 4. If not they'll send 5 or 6. Putting Dak on the ground will be a high priority.