On the Playstation Blog there's a couple of PlayStation All-Stars Battle Royale character videos for Kratos and Radec. These videos cover who the characters are and how their original moves were implemented into this game, and the applications for their supers.
"We wanted to pay proper homage to Kratos, so the approach we took was to have his playstyle reflect some of the most iconic weapons in God of War, such as the Blades of Chaos and Apollo’s Bow. And we wanted his Supers to revolve around his ultimate weapon, the Blade of Olympus, and even have him grow in size to pay homage to his initial transformation into the God of War."
You can read the breakdown for both characters at the Playstation Blog. Both videos can be watched after the break.