More of my theory in the comments

He should be in Ruin.

So if you don't know who Eclipse is, he's basically a mix of Sun and Moondrop (Like an eclipse, that's why he was named that) and he was an easter egg in SB. Anyway, I'll leave a pic of him in the comments.

Back to my theory. Since Chica looks like she's melted in some kind of way, that goes back to the Fire and ScrapTrap ending of FNAF SB. Since this is basically the runner-up to Security Breach (I think) then that would go with that ending. All the animatronics were trapped inside the Mega PizzaPlex, including Sun/Moon. Maybe... they merged together during the fire, and created Eclipse? Idk if we're going to see him in the game, but that will be awesome if he was!

WRONG HES ONE CHARACTER.

I'm saying this for an anonymous friend by the way so his rep isn't damaged (idc about fnaf)

He's still a merged version of Sun and Moon
And yes I know he was basically fan-made, but he WAS apart of the game in some way, even if it was just glitched Sun, maybe he will show up in the game instead of Eclipse because with some fnaf games, easter eggs that we see show up later on sometimes.

my friend said he was just a secret background AND sun and moon is already one character

again, idc about fnaf

IMagine if when everything got destroyed, the remaining parts of Sun and Moon fused together, so Eclipse COULD be on the dlc?

That's what I said

Even tho they are the same robot.

Maybe The robot AI was confused because there were light and dark at the same time for fire. So they were merged, adn when they broke, they just fused together.

1, that’s just glitched Sun from BB Balloon world but in full, so not necessary Eclipse-
2, Eclipse is fricking fan made
3, when the heck is Eclipse ever mentioned in fnaf!?!?
4, what are the chances that Steel Wool/Scott add in a fan made character? I know that Scott acknowledges fan games but still.
5, that’s a pretty wild guess :/

yea..

THEY CANT MERGE THEYRE THE SAME CHARACTER STUPID SON OF A BITCh

why are yall getting mad? its a theory

like you, i dont really agree with the theory, but they turn into each other, so... well i dunno.

stupid theyre the same character

well okay then. mabye the 2 looks mashing together then...? again, not agreeing with this persons theory, just justifying it.