The TIE Fighters in Rebels have smaller wings than the ones in the original trilogy. They are based on the proportions of the original Kenner toy version.
First of four preview shorts that introduce the Rebels characters before the series premiere. This short introduces Kanan Jarrus, Hera Syndulla, Chopper and their freighter, the "Ghost".
The story of how Kanan and Hera first met, 6 years before the start of the Rebels TV show, was chronicled in a novel by John Jackson Miller titled 'A New Dawn' and was released on March 31, 2015.
Kanan's call sign is "Spectre-1" and Hera is "Spectre-2". These numbers were chosen to make Kanan appear to be the groups leader, while in reality it is Hera who calls the shots. CH-10P aka Chopper is "Spectre-3", as the droid has been Hera's companion even longer than Kanan, ever since his Y-Wing crash-landed in her backyard during the Clone Wars.
Many of the shots in this short are direct copies of the Tie-fighter, Millennium Falcon fight from Star Wars: Episode IV: A New Hope, with the Ghost replacing the Millennium Falcon.