I think that the most bad-ass child of a pairing would have to be Rossi and Hotch... I mean, a former Marine and a former SWAT team member, a BAU founder, SSA's who both undoubtedly kick serious ass on a pretty regular basis...

Umms... Yeah... that kid would definitely go places... Or end up a chef, you never know (damn it Sean *annoyance*)...

Although I do agree that Prentiss and Garcia would definitely have a ninja child... I just think Rossi/Hotch would have a Spartan (for those of you who watch Deadliest Warrior)...