I can imagine Mikey's dad Irving would still be hassled by Mr Perkins until he actually gets the gems valued and is able to continue mortgage payments, they will likely still face eviction.

Chunk might try to take Sloth home to live with him but his parents will likely get sick of his unpredictable behavior and want him to leave, in which case Chunk might try to run away with Sloth and he will likely get arrested and placed in a psych ward.

Brand and Andy will hang out and date but she might still have some feelings left for Troy which will complicate things and make it hard for her and Brand to take things further later.

Stephanie and Mouth seem to make up at the end and share a kiss but they will likely grow tired of each other due to their different personalities and things might not last between them.

Can anyone think of more to add or maybe alternate possibilities to mine?