Hey just a suggestion idea, what if you made an Over the Garden wall Sequel?
Like years time skip where Greg is like 13 and Wirt is an adult and Sarah is like a new main character in the trio as strange things start to happen again as Y/N might need help for them and at the same time Sarah is trying to remember the boy she use to love? And Wirt and Greg reunited with their brother again?
Just a thought for the future