One of the biggest ways that Rogue One connected to other media was by featuring Forrest Whitaker as rebellion leader Saw Gerrera.
Though not originally voiced by Whitaker, Saw first appeared as a freedom fighter on Clone Wars.
The film has just become the second highest grossing Star Wars film of all time, and the Lucasfilm story group is keen to capitalize on that victory by making sure the fallen heroes of the film live on in other media.
Like Clone Wars before it, Rebels has featured a number of cameos from Star Wars film characters in the past, often getting the original actors to provide their voice.