If you open it up to fantasy sports in general, make sure to talk about which ones are most popular (I know we all love fantasy baseball over here but football, i think we have to admit, is the most popular if you're looking at the entire country). I would also talk about how the different sports are all different, as football is a shorter season, has more of a luck factor, etc. but can be more exciting than baseball, basketball, etc.
Sounds like a fun topic. Good luck
"Oh, that Lankford and McGee, the trio of 'em. They're a one-man wrecking crew."