@mycarhasaMoustache  
If hasn’t been proved or rejected it’s up to the fandom to decide.

@Sixes&Sevens  
Tell you what is even better than that…… No Religion at all, Friendship and harmony can be achieved without worshiping a higher being. The key being put others before your self.

@Background Pony #FEAB  
What the truth? But surly enlightenment is what you seek.

I think that this is quite an interesting interpretation, honestly. Though, as Equestria is at present arguably a tetrarchy, plus Discord, a polytheistic religion might be better suited. This is not altogether a stretch; as Campbell found, the story of Jesus is a prime example of a ‘monomyth’, i.e., has roots in other cultures, notably in the birth of Dionysus. There are other examples, but that’s the only one I can recall specifically, though I think there was a similar pattern in Egypt and possibly India.  
The show itself will certainly never truly address the religious implications of the Equestrian system of direct theocracy, though it could certainly be funny if it did. Imagine comparing Celestia to Mitunas Titunas! Prime “Molestia” material there, I suppose. Sibling deities who control the sun and moon are another common mythical theme, as well, and it would be fascinating to see who Discord would be equated to. Probably not Satan, nor yet Lucifer. Hermes or another Trickster might be more apropos.  
Then again, my running theory is that they’re all benevolent Lovecraftian elder ones in more-or-less disguise, so what do I know.

@mycarhasaMoustache  
Don’t say that my dear friend.

@infinita est lux Solis  
You just say that because you are just to shy to admit your new found love for Sunset-Jesus.

@Background Pony #FEAB  
Not really. It would have been pretty important to the plot of the first 2 EQG movies and if it were true it would have been mentioned by now.

@Background Pony #FEAB  
I agree with Moustache here… Celestia shouldn’t have any off-spring.

@mycarhasaMoustache  
So long as The show, The comics, The movies, The writers and the toys doesn’t states that Sunset isn’t Celestia’s Daugther my theory still lives.

@Background Pony #FEAB  
My point being there is literally no mention of it at all at any point. If it were true Im pretty sure that would be been mentioned in the first Equestria girls movie Since Celestia only ever refers to her as her old student.

By the way this thing is better because it was in Evangelion. :3  

@mycarhasaMoustache  
Where & when?

@Background Pony #FEAB  
The show, The comics, The movies, The writers and the toys.

@mycarhasaMoustache  
Says who?

Why so many downvotes? It’s not any crazier than other headcanons.

@infinita est lux Solis  
They are one and the same, i understand you are a bit shy, but it is ok we accept you anyways, you did open your heart for Sunset-Jesus by forgiveness, you just don’t want to admit it for now 6 i understand that.

Well this falls flat on its face since Sunset is not Celestias daughter.

@Background Pony #FEAB  
I don’t like Sunset-Jesus… But forgiveness is ok.

@infinita est lux Solis  
See i know you could do it, that’s the spirit, forgiveness, just as Sunset-Jesus is teaching us.

@Background Pony #FEAB  
That’s ok…

@infinita est lux Solis  
I said i was sorry.

I love this. XD

@Background Pony #FEAB  
(Warning: Political) As a leftist I am offended by this

ur sul otherwise  
DED. DED. DED.  
(refer to ideology of being split to body, soul and …)
 
… Time

@infinita est lux Solis  
I really do hate to be that BGP, but i really must be that BGP now when i say this.  
ACHTUNG-JUDEN!…  
sorry.