I know that it might not be the most likely world, they can make it work, though.
The arcade might be closed for the weekend so there aren't any people around. Everyone's gone home. Sora, Donald and GOOFY (Never gets old in that order) could appear in the arcade confused, if it was even a world. Sora possibly could be excited to play video-games but Goofy reminds him to stay on track. Suddenly digitalized heartless may appear inside an arcade machine. Merlin might transport them inside the arcade to fight, while the group meets Ralph, Felix and the Nicelanders inside. Felix protects the Nicelanders and Ralph appears to fight alongside Sora and Donald.
The Heartless may have the role of invading the different arcade machines, including arcades made special just for this game, that did not appear the first movie (If KHIII releases before Wreck-It-Ralph 2). The Heartless themselves, besides the Shadows, Soldiers and the like, could be based on video games. They might pay homage to enemies, items or whatever. Ideas being swords, shields and rods. (Slice Ice, Flame Shield, Lightning Rod) [i'd laugh my ass off if those happened, because simply of their names being too funny but work]
I'd be unsure if whether or not Ralph would be a support character or a party member. I'd be fine with either, but for him to be with an optional party member would be better since Ralph would not mind going to other arcades anyway. Ralph could potentially have a wake-up call battle where you have to beat him to make him come to his senses as well.
Half-way through the world, Heartless can attack the Nicelanders again, with you needing to stall time for Felix so he can fix the Apartment.
Since there are apparently enemies so large you can ride on them, maybe you can ride a giant candy Heartless and you have to bash its "Armour" by cracking the candy shell. Or you can ride a swarm of Cy-bugs while protecting something.
Of course the final battle could be King-Candy. This opens ideas for candy-based heartless, somewhat like the Bulky Vendor and Rare Vendor.
Those are just my ideas. Feel free to criticize the way I think.
I know that it might not be the most likely world, they can make it work, though.
The arcade might be closed for the weekend so there aren't any people around. Everyone's gone home. Sora, Donald and GOOFY (Never gets old in that order) could appear in the arcade confused, if it was even a world. Sora possibly could be excited to play video-games but Goofy reminds him to stay on track. Suddenly digitalized heartless may appear inside an arcade machine. Merlin might transport them inside the arcade to fight, while the group meets Ralph, Felix and the Nicelanders inside. Felix protects the Nicelanders and Ralph appears to fight alongside Sora and Donald.
The Heartless may have the role of invading the different arcade machines, including arcades made special just for this game, that did not appear the first movie (If KHIII releases before Wreck-It-Ralph 2). The Heartless themselves, besides the Shadows, Soldiers and the like, could be based on video games. They might pay homage to enemies, items or whatever. Ideas being swords, shields and rods. (Slice Ice, Flame Shield, Lightning Rod) [i'd laugh my ass off if those happened, because simply of their names being too funny but work]
I'd be unsure if whether or not Ralph would be a support character or a party member. I'd be fine with either, but for him to be with an optional party member would be better since Ralph would not mind going to other arcades anyway. Ralph could potentially have a wake-up call battle where you have to beat him to make him come to his senses as well.
Half-way through the world, Heartless can attack the Nicelanders again, with you needing to stall time for Felix so he can fix the Apartment.
Since there are apparently enemies so large you can ride on them, maybe you can ride a giant candy Heartless and you have to bash its "Armour" by cracking the candy shell. Or you can ride a swarm of Cy-bugs while protecting something.
Of course the final battle could be King-Candy. This opens ideas for candy-based heartless, somewhat like the Bulky Vendor and Rare Vendor.
Those are just my ideas. Feel free to criticize the way I think.