so the first idea that i have for the first chapter of the story is that we can have it start with Lucy ,Natsu ,and the other fairytale characters are doing a job. nothing special happens until Lucy trys to use one of her keys but then instead of the being she made a contract with one of the homestuck guardians come out but has no idea how it got there and runs away. then suddenly all of her other keys without permission letting the other guardians out. Then in the next chapter we show the main homestuck characters trying to find their guradians but not being able to. i dont know what to do with the undertale one. perhaps the barrier can all of the sudden be broken.
the story can start like that or it has the main bad guys from homestuck(lord english) fairytale(???)undertale(Chara) all of the sudden the other bad guys from homestuck and fairytale are trying to figure out who they are and why they are here. Then chara comes out and explians what is happing and her plan they all agree. then the chapter in the first paragraph could happen .
it then shows our 3 or 4 heros that we have created. they have no idea of what is going on and their days start out normal but then they all notice something is wrong.
Ty is going to destory and ace is going to be beat up and stuff all that and this takes ace to too get sucked though it and it off sets the balence of things and causes homestuck to get mixed with fairytale.