-snip- It will be two very easy games that Barcelona will win 
Don't be overconfident! Although those are weak teams, it doesn't guarantee at all. You know, Barca is in under pressure and they're probably too eager to win. This sometimes may lead to a draw or loss result if they cannot control their selves well. -snip- as there is still a chance for Barcelona to return to the top as if Real Madrid lost in this derby match.
Yes, Barca has a chance to come back at the top if Real Madrid loses. But, if we look at the performance of the two clubs in the last few matches, I think Real Madrid should have a higher chance to win.