I doubt it'll be Blackpool personally - from the 2 games I've seen they always seem to have a few good chances and even though they got hammered by Arsenal they did create a few chances even though they were down to 10, a bit of luck might have made the scoreline look a bit better.
Wigan don't even seem like they're going to score. They've had a number of good long range shots and I recall they carved up Blackpool once in their opening game but that's about it