Loona always revolves their comebacks after astronomical events. For example they released "Butterfly" on a super moon and they released "Hi High" when the moon, Mars, and Saturn were all visible in the sky at one period of time (which is a rare astronomical phenomenon). They released Hi High on that day because the music video was about all the girls coming together as one (a reference to the moon, Saturn, and Mars being in the sky at once). Also, the moon phase that day was a waxing gibbous. Waxing means getting bigger and gibbous means it's more than 3/4 full but not a full moon. There was a moon visible all throughout the Hi High music video and each time a new girl was added, the moon filled in more. The waxing gibbous is important because it was was symbolized by the fact that Olivia Hye had trouble getting out of her universe, so the moon in the music video was stuck as a waxing gibbous for most of it until Choerry and Yves could find her and bring her down to the 1/3 universe, where all 12 united as one. For Butterfly, it was released on a super moon because that song and music video were about equality and self image, which is a big, controversial, thing in South Korea, so the super moon represents them standing up to the Korean media in order to take a stand against bullying and stuff. For Burn, I think it will be released on January 10th because there is going to be a lunar eclipse and a full moon. The full moon represents all the girls unity, but does it? Because in the teasers Vivi was alone, and so was Heejin. But it appeared that Hyunjin, Olivia Hye, and Choerry were stuck in one place. This is important because they all come from different universes. In the teaser, you can see Heejin waking up, floating in the air. This is important because the Hi High music video ended with Heejin leaping into the air and running on it. However, she is wearing the clothes from Butterfly.The lunar eclipse is whenever the Earth blocks the sunlight from reaching the moon, resulting in a super concentration of light from the sun on the Earth, blocking the light from reaching the moon. The title track is called "Burn" and I think that's because it is talking about the super concentration focusing on the Earth universe, aka 1/3, and burning it. This is why you can see Heejin (A member of the 1/3 universe) walking in between two rows of clouds, because she's in the OEC universe, but then she takes a step up and goes into Eden. The music intensifies because if you voluntarily let yourself into the Eden universe you can't escape unless you eat the fruits, which are delivered by Choerry. They are delivered by Choerry because she can universe jump, so she takes fruit from the 1/3 universe and puts it in the Eden (yyxy) universe so they can escape. But now that 1/3 is "burning" there is no fruit left, so Heejin, the "creator" of the universes has to risk herself in order to save the universes (and possibly Yeojin, too, but I think she may have been found by Haseul in Hi High). Another reason why it would happen on the lunar eclipse is because the moon is dark during the eclipse when it should be at the Full Moon stage. This implies the member's seperation, as seen in the teasers (because a full moon in the Loonaverse means unity). Loona, the group name, is pronounced as "luna", which is the old name for the moon. That is why the moon is such an important part of the Loonaverse. HOWEVER in the case of this lunar eclipse happening on the 10th, the moon will be fully visible as a full moon, which is rare, and suggests that the lunar eclipse is going to be partial. This suggests that some of the members will be lost (like Vivi and Heejin) and some will be connected (like Hyunjin, Olivia Hye, and Choerry).

I saw someone say "Wouldn't it be cool if they released Burn on the 10th because of the lunar eclipse?" and then I came up with this theory.

If I got any astrological facts wrong, or parts of my theory are wrong, then please tell me. Also feel free to comment your theories about Burn as well :)

Edit: I was wrong. Burn is coming out February 5th. I guess I'm going broke.

:/