So not expecting Jedi Luke till August when cls came out last year. But as with cls and Jedi training Rey the devs like to use heros that are only unlockable from certain areas ( raid han solo) or heros that have fallen out of use (old ben). So figure its best to get a handle on who need early to get them unlocked, 7 starred and geared up. We also know they like to fit the stages with key scenes from the relevant film. Since cls kept in line with new hope, Jedi Luke will match up with empire strikes back. That being said here's my setup for Jedi Luke.
Hoth Han Solo, Hoth Leia, CLS, R2D2, Hermit Yoda
Stage 1: Hoth Han and CLS fighting imperial probe droids and wampas
Stage 2: Han, Leia, CLS, and R2D2 (escape from Hoth)
Stage 3: CLS, R2D2 and Hermit Yoda (training)(possibly force projection of Darth Vader)
Stage 4: CLS (vs Vader).
Now some might say if the final stage is at cloud city lando or lobot might possibly necessary but that part of the film mainly involved Leia, Han, Chewie and C3PO. This event is about Luke's journey not theirs so it will be strictly Luke vs Vader.
Stage 1: CLS fighting Wampas and Probots solo
Stage 2: Hoth Han, Hoth Leia fighting in Rebel base to falcon waves of troopers
Stage 3: CLS meets Hermit Yoda fights Vader in tree
Stage 4: Hoth Leia, Lando Lobot Ugnaught fight Stormtroopers so we get Han in Carbon
Stage 5: CLS R2 fight waves of troopers and Boba on Bespin
Stage 6: CLS fights Vader in Carbon Chamber
Stage 7: CLS fights Vader in central core, loss of hand
If they do that I'd assume: regular Leia and Han, lando, lobot, but you'd need a fifth and we don't have classic chewie or c3po and R2D2 was with Luke.
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Stage 2: Hoth Han, Hoth Leia fighting in Rebel base to falcon waves of troopers
Stage 3: CLS meets Hermit Yoda fights Vader in tree
Stage 4: Hoth Leia, Lando Lobot Ugnaught fight Stormtroopers so we get Han in Carbon
Stage 5: CLS R2 fight waves of troopers and Boba on Bespin
Stage 6: CLS fights Vader in Carbon Chamber
Stage 7: CLS fights Vader in central core, loss of hand
Unlock Jedi Luke