I don’t like how canon’s going so I shall simply introduce you all to the alternative reality of the show that has lived in my head rent free since Lunar and Old Moon died.
Blood Moon and Harvest Moon are living as Sun’s cats. Sun doesn’t know this, Blood Moon and Harvest Moon are too busy getting spoiled and pampered and loved on to tell Sun, nor do they have the voice box to do so.
Old Moon separating from KC didn’t kill him but made a new AI, New Moon, that took over their body while Old Moon is just inactive because he thought he’d die and turned himself into a catatonic state in their head.
New Moon has no idea Old Moon is alive and neither does literally ANYONE else. Not even Old Moon knows he’s alive.
Eclipse does not get the star. After Sun tried to kill him, he went into hiding and became a better person so he could eventually show his family he’s changing so he doesn’t get another murder attempt for his head.
Solar Flare and Eclipse split eventually, Flare stays because he knows Eclipse is lonely and he’s trying to change and he appreciates this.
Flare also sneaks in and deletes the encrypted file he sent to Old Moon of the way to kill every one of Eclipse’s backups and Eclipse himself.
KC still goes off working at the soup kitchen and having tinder dates. But he’s grieving his children in assumptions that Sun has killed all three of them (four if he includes Flare, which he does).
Lunar doesn’t die because Eclipse doesn’t kill him. Lunar is the one to find Eclipse handing out food and blankets to homeless people and just yoinks him home and demands Lunar, Eclipse, and Flare play Uno together. Monty walks in on this and is completely shocked and confused.
Jigsaw comes in like a bat out of hell and does make a New Blood Moon. New BM almost instantaneously hates him and he tosses him off to the daycare so they get two new brothers, neat.
KC comes back once Sun and New Moon send word that he technically has two new kids. KC yoinks them, New BM gets to enjoy living the hippie life in a van in a forest with their dad. New BM gets renamed Zodiac and Horoscope so they can become their own people.
Jigsaw finds out Eclipse is alive. Somehow. He proceeds to scream and whine to Eclipse about how he wants a family and ‘how unfair it was that New BM got a family’.
Eclipse tells him to just reconcile with Moon and Sun. Jigsaw does this. And accidentally tells them that Eclipse is alive.
Sun and New Moon hunt down Eclipse and find him and Flare playing Scrabble. They do not kill him. They just call KC and KC’s camper van now resides in Lunar’s backyard. Lunar moves back into the daycare.
Lunar finally meets Sun’s cats and immediately points out that the cats are Blood Moon and Harvest Moon. Sun hands them over to New Moon to put into new bodies. KC gets another call. Sun gets two new cats. Blood Moon and Harvest Moon keep their cat ears and tails out of spite.
New Moon eventually feels Old Moon moving around in that head of theirs. KC is sent in as a volunteer for investigation. KC sighs and helps them separate New Moon into a new body so Old Moon has his body back. New Moon gets renamed Orbit.
Moon constantly jokes afterward that KC owes him six months of back child support for ‘their illegitimate son that they technically made together’, aka Orbit. KC always jokes back asking for joint custody or visitation. Orbit continues being an adorable boy and following in Moon’s footsteps.
Good Eclipse flees his dimension and becomes part of the main family. KC gets yet another call and yet another kid. KC can no longer fit his family in the camper van in the backyard. Everyone nicknames him Solar. Eclipse claims he, Jigsaw, and Solar are triplets.
The old twins and new twins have a show together. So do Eclipse, Solar and Jigsaw. Lunar’s show is with KC instead of Earth and jokingly gets called the Peepaw and Grandson Show.