<font color=navy>It really depends on whether there'll be two teams that people will want to watch. I have always been told that Disneyland is almost empty on Superbowl Sunday, and it turned out that the one year we went was when two CA teams were playing, and that Sunday turned out to be one of the busiest of the year.
Hopefully, someone else will have better info than me.
My sister and I have gone many times to DL on Superbowl sunday, it's full of women and children.
You generally don't see as many guys there on Superbowl sunday, I think all the women take their kids so their husbands can stay home and watch the game. My sister and I always laughed at how few guys there were on that day. It's usually not much less crowded than a normal off season weekend. But it's generally not too much more crowded than a normal off season weekend. We went last night and it had just started raining when we got there. Most lines were about 20 to 30 mintues, and got shorter as the evening wore on. As we got there, there was a mad rush to leave because of the rain. So I wouldn't expect to walk on everything, but the line's probably won't be too long. (although I could be wrong). Really the biggest thing about Disneyland on the weekends depends on how nice the weather is since that's when a lot of the locals go.