At this point raku better pick chitoge. I mean you can't make the girl spend so many time with the lead and then starts to like her but only for it to be nothing. He will chose chitoge at the end because that was a beautiful sacrifice.
And also their are many things still unfold like chitoge birthday when he remembered something and also the ribbon. If the artist do another meat up plot like naruto I'm done. Their relationship had so much development, raku has to choose chitoge. If not another artist on my hate list.
So what I'm thinking is the battle that will bring the downfall of the city will take place, durring the battle his curse will be fully activated, most likely from heartbreak. LI most likely went back to his world which caused, the king to become a statue and his world destroyed for good.
Things might end up changing if Anubis is infact Rocky from the future. He might try to save him from the curse like he said, so history wouldn't repeat itself. The red stone and the purple necklace, most likely will be something important.