As for what the new story for the new version of Happy Tree Horrors would look like, it will be different to the old story @FoolishSquirrel32 has for his game, but if Happy Tree Horrors failed as a Full Game, then he would redo the entire series as The Revenge Of Mikhail like what my 500 Followers post would be like. So with that said and done, let us compare FNOHTH's Story with HTF: TROM's Story to see how much better it would look like

Five Nights Of Happy Tree Horrors' Story:

Cuddles and his friends have been invited for a holiday at Bleatston Hall, birth place of Lammy and home of her father that is, things get better when they see that famous hero Splendid is here, everyone was excited except for Cuddles for an unknown reason...

However, one night, when he went to sleep, Cuddles dreamed he was in a strange location and there were Photo-Negative iterations of his friends and foes called "The Inverted", they cannot be killed (Making them more dangerous than Fliqpy) and if they get Cuddles, they kill him and if Cuddles dies in his dream, he dies in real life!

Survive from 12 am to 6 am and he'll wake up from the deadly nightmare.

Now this original story of the game is made by @FoolishSquirrel32 himself, but for the new story, it is entirely Rewritten by me, and the story is much more different to the original, it is way better than the old one though, and here is what it looks like.

Happy Tree Friends: The Revenge Of Mikhail's Story:

It has been many years since the burning of the old Lammy's Candy Place location in 1995, and Lambert had to use his intelligence for making a brand new location at the Happy Tree Town Residence. At Bleaston Hall, Lammy's Birthplace and Homeplace of Lambert himself, as he went to his room, Lambert felt a presence of someone Human like, someone was telling him why he did all of this to kill him. Lambert managed to turn around and see someone, standing menacingly, staring at him, Lambert then Identified this humanoid as "Mikhail Schmidt" who he murdered with one of his prototype animatronics at Lammy's Candy Place, right before he started to use the cloning machines that were made by Sniffles' Parents who also died in the same location too before. Now it is the present day and Lambert has sent letters for a Holiday at Bleaston Hall

Meanwhile, on the other had, Cuddles and his friends were just having some fun at his house, until a letter came in and was placed inside the mailbox. As Cuddles checked his mailbox, he realizes that he and his friends are invited to a Holiday at Bleaston Hall, which was Lammy's Birthplace and the home of Lambert Pickles, everything gets to feel better when the famous Superhero Splendid came to Cuddles' home just to pick everyone up for the trip to Bleaston Hall, everyone was so excited for their trip, except Cuddles because he felt like Mikhail was watching him and he was told by him that it was all Cuddles' fault for killing him though

However, during one night, things turned for the worse as he starts to be dreaming of a reconstructed office of Lammy's Candy Place, with some unmade changes like different robots from another location. And he saw Nightmare versions of Jolly, George, Tweetie, Maxie, and Antonette. as well as Mikhail, who is a different version of George separate from his human form, and the different Alpha and Omega Monsters made by Ruby Jolly and Golden Tweetie themselves, and many other monsters from different locations as well, and they all want Cuddles dead, if he dies in his dream, he dies in reality too

Can you survive from 12AM to 6AM and survive the nightmares, or will you become Mikhail's victim who made him get his revenge on you

And that is what the story would look like, the Inverted would no longer be in the game, and you would be dealing with loads of monsters from the Jolly Horrors Saga and you'll have to deal with them and survive the night

That's all for now, see you on the Flip-Side