I thought of a Classic Mode route for Sora if he got in.
The gimmick is that all of the opponent's are based off of various Disney villains. Also, in every match, Sora will have two CPU allies representing Disney heroes, one of which is always Duck Hunt (Donald & Goofy).
1.

(Black Alt.)[Pete] on Destiny Islands (Music: Night of Fate)
Allies:

[Donald and Goofy],

(Black Alt.) [Mickey Mouse]
2.

[Jafar] and

[Genie] on Gerudo Valley [Agrabah] (Music: Hand in Hand)
Allies:

,

(White Alt.) [Aladdin]
3. Giant

(Purple Alt.) [Ursula],

2x (Blue Alt.) [Flotsam and Jetsam] on

(Battlefield) [Atlantica] (Music: Shrouding Dark Cloud (KH3 version))
Allies:

,

(Red Alt.) [Ariel]
4. Master Hand & Crazy Hand (Regardless of Intensity) [Ice Titan & Lava Titan] on Palutena's Temple (FD) [Olympus] (Music: The Deep End (The Final Phase))
Allies:

,

(Yellow Alt.) [Hercules]
5. Giant

(Classic Green Alt.) [Oogie Boogie],

[Lock],

(Purple Alt.) [Shock],

[Barrel] on Luigi's Mansion [Halloween Town] (Music: Another Side – Battle ver.)
Allies:

,

(Black Alt.) [Jack Skellington]
6.

(Brown Alt.) [Ironically, Captain Hook], Sora (AntiSora Alt.) [AntiSora] on

[Neverland] (Music: Fate of the Unknown)
Allies:

,

[Peter Pan]
Bonus Stage
7.

(Black Alt.) [Maleficent] on Find Mii (FD) [Hollow Bastion] (Music: Scherzo di Notte), followed by Giant

[Maleficent's Dragon Form], (Music: The Deep End (The Final Phase))
Allies:

,

[Beast]
Credits Theme: Link to All