The Secret Saturdays is an interesting cartoon. Part Johnny Quest, part Ben 10, The show has a really great feel to it that I think appeals to both adults and kids.
The show centers around a family of Cryptozoologists who go on missions to protect the identity of supposedly mythical creatures like Bigfoot and Chupacabra. It's an interesting premise, and the animation is not that bad.
Mattel has the master license and showed some initial toys at toy fair. Unfortunately, they only showed the creatures from the show, not the actual characters. Also shown was a role play item - Zak Saturday's claw staff.
The Secret Saturdays can be seen on the Cartoon Network.