- A lot of fans of The Force Unleashed dislike that the show is overriding it from the canon, even though the creators have stated that the show won't be about the foundation of the Rebel Alliance so much as how it gained support.note A particularly odd note, and part of the reason that fans of the game are confused, is that George Lucas was involved with the project; his involvement in anything related to Star Wars is typically treated as canonical even after the Legends decision canned most of the Expanded Universe.
- The status of the Clone Troopers and Stormtroopers in this series is cause for constant disputes among fans. There are those who are worried that after doing well building up the troopers in The Clone Wars instead of having them be mere Cannon Fodder, this series is simply going to diminish all of that by doing exactly that. This was lessened somewhat by Dave Filoni stating the Clones were retired from duty and the Stormtroopers seen in the show are recruits with significantly less training. But then there are also people who wanted to see how certain Clone characters would adapt to being Stormtroopers in the Imperial Regime. As former works of the Expanded Universe did feature Stormtroopers being comprised of Clones up to a certain point in Imperial history before recruits were enlisted, and though significantly lessened in number they did continue to serve alongside recruits until the time of the Original Trilogy. Thus, these people are of the mind that by explicitly stating that none of the Stormtroopers are Clones the series is throwing away too much of the Expanded Universe. Though since the Expanded Universe was rebooted by Disney, this show has priority over older lore unless the writers want to use the latter through Broad Strokes.
- A number of people dislike that the Stormtroopers seem to be more incompetent than usual, while others claim that they weren't too threatening in the movies and that their portrayal on the show isn't too far-removed from previous works. Though it can be really hard to take when the crew is standing still, fully out in the open, and are not even grazed. Still, an unnamed mook killing a main character rarely, if ever, happens.
- Ahsoka's Ambiguous Situation at the end of Season Two. Some feel that by leaving her fate unresolved, but by and large as good as dead, was a disservice to the character, as well as taking it as a sign that the writers didn't have the guts to kill her off due to a possible case of Creator's Pet. Others are optimistic that this now leaves her open to be used by other creators of the Star Wars canon universe, maybe in a starring role, and that maybe she will even show up again in Rebels further down the road.
- The Season Three trailer showed that Rebels would be taking a lot of ideas and even characters from the old EU; while many fans are ecstatic about this, there are a good number who wish that the creators would leave the EU alone, either as a desire to see new things in the Star Wars canon, or not wanting to see a Disney-fied or "kiddy" version of their favorite people and things.
- Come "Visions and Voices", It's been confirmed that Obi-Wan and Darth Maul will have a rematch. Now, people either find this suffering from Arc Fatigue, because Maul had already dealt with this issue in The Clone Wars and seemingly closed it by Revenge by Proxy on Satine to hurt Obi-Wan, or are ready for the likely final showdown between the two that will happen on Tatooine, Where It All Began, near the season finale.
- Complaints and detractors have claimed that the lack of communication between Lucasfilm and the fanbase is what's making the fanbase continuously upset with "filler" episodes like "Iron Squadron". This may be because of Rebels unique Animation Lead Time; as the entire show was commissioned by Disney when it was proposed, there is no waiting time between the creation of seasons. For example, as Season 1 began to air, Season 2 was already being recorded (and thus very much past the writing process for Season 2 already). So any complaints in one season likely won't be addressed until two seasons later, meaning that problems from episodes could continue to happen for a year or two. This is likely the reason for the first half of Season 3's similar format to Season 2 with disconnected episodes, due to no feedback or reception on Season 2's episodes at the time of Season 3's writing (which would be during the airing of Season 1).
- In addition, Hidalgo revealed on Twitter that the reason why Rebels won't be bumped up from its Y7-rating on Disney XD is out of fear of being screwed by ratings, due to The Clone Wars being canned before the Disney buyout, as there was not enough viewership (who were becoming turned off from the maturity and being easy to be lost if you miss an episode or an entire arc that contributes to the entire show's plot) as time went on for Warner Bros. to keep greenlighting more content. This ended up further raising the question of who Rebels should really be aimed towards and Disney's competence with the IP, and if the supposed reason for why Rebels seems to be holding back is well-founded or weak and wimpy.
- Whether or not Maul's death in "Twin Suns" actually works. Some fans believe it was a fitting end for the character, dying in the arms of his old foe while believing that "the Chosen One" would avenge everything that the Sith had done to him and those he loved — and possibly what had been done to Obi-Wan, finally making some sort of peace with him. Others felt that his death was a waste and a cop out, making most of his inclusion in Rebels, or at least its third season, pretty pointless. Still others accept that Maul dying was clearly foreshadowed and inevitable, but wish that he could have gone out with more of a bang than a duel that only lasted a few seconds, especially when his final confrontation with Obi-Wan had been hyped up so much in the marketing. There are also quite a few fans who originally didn't like the battle due to its brevity, but began to appreciate it more after understanding the symbolism and Fridge Brilliance behind it.
- In Season 4, many long-time fans of Star Wars: The Clone Wars were outraged when Sabine handed leadership of Mandalore to Bo-Katan, who declared that she would be leading Mandalore "for her sister", Satine Kryze. While this may not be much of an issue to those who have only seen Rebels, the fact that Bo-Katan undermined her sister's rule through terrorism as a member of Death Watch, slandered her in public, and eventually aided the men who would eventually capture and murder Satine, makes her new position feel like an insult to Satine's legacy more than a way of honoring her memory.
- The revelation during the series finale that Hera and Kanan had a son, Jacen. Some fans were happy that the pair had at least consummated their relationship and that Hera had Someone to Remember Him By, while others disliked how Hera had only told Kanan she loved him at the last minute, and that Jacen looks nothing like the previous Twi-Lek hybrids we've seen in the Star Wars canon.
- His very name has set off flame wars, even between Legends fans themselves. Some of whom think it's a nice Mythology Gag and others who think it's akin to a slap in the face.
Broken Base / Star Wars Rebels