Clear reference to Episode II. Jango Fett has yet to make an appearance in the Star Wars Rebels show.
The text on the back says Jango Fett is Mandalorian. This is up for debate in the new canon, although the Lucasfilm Story Group was established a year prior in 2013.
The ruthless Mandalorian warrior and resourceful bounty hunter Jango Fett fights the Jedi on the planet Geonosis.