Yes, I do actually, I have already shared some lore with @insanelyadd and @thebisexualteen im trying to get everything to make sense and have all the archivists drawn and ready before I start any posts about them, it could take about 1-2 months:p the lore is gonna be TRAUMA, BETRAYAL, BASTARDS all of the above, bit here's a quick explanation of how collector got trapped:

So basically, during the time of the Titans, preserver, and ????? were mad but scared of the Titan's power, and ????? sent out the researcher to learn about the titans. The researcher gathered information about them and told ????? but instead of ????? or preserver collecting The Titans, ????? decided to sent collector (who was 6 in mortal years) down to collect the Titans for his first mission, but the collector instead befriended The titans and preserver decided to force the others, (including our poor observer,) to collect the titans 1 by 1 until only papa titan was left, and Papa Titan accused collector of the disappearance of the other titans Then for trapping him in the mirror and ????? searched for them, only to get the collector's powers back, not because they miss them.