Here's a list of canon characters that are still missing in SWGOH (at least in playable form):
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Prequels:
- Padme (maybe several iterations, but at least the blaster-wielding Padme on Geonosis)
- Anakin (Fallen)
- Ki-Adi Mundi, Shaak Ti, Quinlan Vos, Adi Gallia, Deepa Billaba, Saesee Tiin, and other Jedi
- Capital ships: Grievous' Invisible Hand or Malevolence
- Ships: Vulture droid, Nu-class attack shuttle
Original Trilogy:
- Jedi Knight Luke
- Endor Rebels (Trenchcoat Han, Poncho Leia and the gang)
- Sand- and Scout Troopers
- Deathstar Troopers, -Gunners and -Droids
- Boushh (Leia in bounty hunter disguise)
- Jabba, Bib, Barada, Pote Snitkin, EV-9D9, maybe even Slave Leia (makes more sense than 3PO)
- Ships: Y-Wings, A-Wings and B-Wings
- Ships: TIE Bombers and Interceptors
- Pilots: Porkins, Nien Nunb
.
Sequels:
- Veterans Luke, Leia and Ackbar
- Maz Kanata
- General Hux
- Snoke and/or his royal guard
- Capital ships: Snoke's Supremacy, the Raddus
- Ships: MG-100 Bomber
- Pilots: Jessica Pava, Temmin Wexley, Oddy Muva and others
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Other movies (Rogue One, Solo):
- Saw Gerrera and his guerillas
- Tobias Beckett, Val, Rio
- Dryden Vos and his Hylobon Enforcers
- Pilots: Admiral Raddus, General Antoc Merrick (Blue Leader) and others
- General Anakin Skywalker
- Even Piell, K'kruhk, Roron Corobb, and various other Jedi
- Sugi, Bulduga, Onca, Derrown, and a dozen other bounty hunters
- Hondo Ohnaka and his Weequay pirates, old Hondo from Rebels
- Tactical and Commando droids
- Spider legs Maul, cyborg legs Maul, old Maul from Rebels
- Old Rex and the senior clone gang
- Pre Viszla and Death Watch with younger Bo-Katan, older Bo-Katan from Rebels
- Ketsu Onyo, Ursa Wren, Fenn Rau, and other Mandalorians
- Ships: Z-95 Starfighter, V-19 Torrent
Replies
We need another wookie.
.
Prequels:
- Padme (maybe several iterations, but at least the blaster-wielding Padme on Geonosis)
- Anakin (Fallen)
- Ki-Adi Mundi, Shaak Ti, Quinlan Vos, Adi Gallia, Deepa Billaba, Saesee Tiin, and other Jedi
- Capital ships: Grievous' Invisible Hand or Malevolence
- Ships: Vulture droid, Nu-class attack shuttle
Original Trilogy:
- Jedi Knight Luke
- Endor Rebels (Trenchcoat Han, Poncho Leia and the gang)
- Sand- and Scout Troopers
- Deathstar Troopers, -Gunners and -Droids
- Boushh (Leia in bounty hunter disguise)
- Jabba, Bib, Barada, Pote Snitkin, EV-9D9, maybe even Slave Leia (makes more sense than 3PO)
- Ships: Y-Wings, A-Wings and B-Wings
- Ships: TIE Bombers and Interceptors
- Pilots: Porkins, Nien Nunb
.
Sequels:
- Veterans Luke, Leia and Ackbar
- Maz Kanata
- General Hux
- Snoke and/or his royal guard
- Capital ships: Snoke's Supremacy, the Raddus
- Ships: MG-100 Bomber
- Pilots: Jessica Pava, Temmin Wexley, Oddy Muva and others
.
Other movies (Rogue One, Solo):
- Saw Gerrera and his guerillas
- Tobias Beckett, Val, Rio
- Dryden Vos and his Hylobon Enforcers
- Pilots: Admiral Raddus, General Antoc Merrick (Blue Leader) and others
.
Cartoons (Clone Wars 2D, Clone Wars 3D, Rebels):
- General Anakin Skywalker
- Even Piell, K'kruhk, Roron Corobb, and various other Jedi
- Sugi, Bulduga, Onca, Derrown, and a dozen other bounty hunters
- Hondo Ohnaka and his Weequay pirates, old Hondo from Rebels
- Tactical and Commando droids
- Spider legs Maul, cyborg legs Maul, old Maul from Rebels
- Old Rex and the senior clone gang
- Pre Viszla and Death Watch with younger Bo-Katan, older Bo-Katan from Rebels
- Ketsu Onyo, Ursa Wren, Fenn Rau, and other Mandalorians
- Ships: Z-95 Starfighter, V-19 Torrent