I wonder what a fully Tolkien Estate-approved adaptation of anything would actually look like -- certain things do have to be lost when you're adapting things to suit a new medium. (There was a LotR musical, even...)

I think Arwen gets referred to as "Queen Evenstar" in translation in the Appendices, so she might be also "Queen Undómiel" the same way Aragorn is "King Elessar", though we never see him as "King Elfstone". In any case it looks like their "given names" (Arwen and Aragorn) might not be used in official/historical documents much any more. Naming traditions in Tolkien are weird, ahah.

This is the cover of the Silmarillion I have -- those are clearly the Silmarils on the cover, sure, but I have no idea who that's supposed to be posing with them (why is their hair blue???) As for the other covers, they have to be seen to be believed, I'll see if I can post proper pictures later, or something. It's good to have proper paper copies to mark up and hold, electronic copies are just not the same at all.

I know you mentioned you were planning two, but I'm really curious -- what do you have imagined for Celebrimbor and Narvi? I don't think Narvi ever gets a mention in canon except for his namedrop on the door.