#4: The Fiend gets trapped inside the Firefly Fun House, as Randy Orton burns it to the ground at WWE TLC
The Firefly Fun House gives The Fiend or Bray Wyatt a home-turf advantage over other WWE Superstars. There is no one more familiar with the eccentricities of a match related to the Firefly Fun House other than Bray Wyatt.
So if Randy Orton is booked to win, The Viper probably wouldn't achieve the victory through a straightforward path.
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The Fiend is immune to fire, to some extent, as witnessed on the go-home edition of WWE RAW. But would Bray Wyatt's alter-ego be able to escape his fate, if The Apex Predator manages to trap The Fiend inside the Firefly Fun House with no means of escape, especially when it is set on fire?
Everyone's answers to the above question may vary, but there is no denying that it would be one of the few last-minute moves that Randy Orton could make to outmaneuver his long-time rival.
Of course, this wouldn't be the end of their current feud. It should only end with The Fiend winning over Randy Orton, and the same can be accomplished in a relatively normal match at the Royal Rumble event next year.
As for how WWE will explain The Fiend making a comeback after TLC through the aforementioned finish, they don't necessarily need to state anything. Movie monsters often return after being put through situations that would otherwise kill a normal person. The Fiend is not a normal person, and what can't kill The Fiend will only make him stronger.