Like the Celestial eladrin, at long, long last
How would these 2e Eladrin even translate into 5e?
Essentially, they are all a 5e 2024 Elf.
It is hard to say whether they are primordially Fey, or else maybe Humanoid or Celestial. The "first elves" -- the ones that shapechange at will -- seem like they are Fey. So the restoration of Elves would be Fey as well.
Are the 2e Eladrin no longer racist hierarchies, but simply different Elf "lineages" now, without an inherent superiority/subordination?
In 2e they were variants of ordinary Elf "subraces".
Tulani ~ Grey Elf
Ghaele ~ High Elf
Firre ~ Half Elf
Bralani ~ Wild Elf (Grugach)
Shiere ~ Wood Elf
Noviere ~ Aquatic Elf ~ Nixie
Coure ~ Drow banished! so Pixie instead
Maybe the 5e Elf lineages are useful here? So a 5e translation has something like:
Tulani - Astral Elf (Spelljammer)
Ghaele - High Elf
Firre - Eladrin Elf (Mordenkainan)
Bralani - Athas Elf (Dark Sun)?
Shiere - Wood Elf
Noviere - Sea Elf (Mordenkainen)
Coure - Drow Elf!
And if so, none of these Celestial elven cultures imply "rank".
Or oppositely, these strictly refer to a political rank and any elven lineage might apply for any office. The Ghaele might be Drow, and so on. If so, maybe these political titles are epic destinies - and may be they arent Celestials but rather Archfey who inhabit the Celestial Planes.
And how would Eladrin even fit in among the planar "natives"? Is it so that Aasimon=LG Angel, Eladrin=CG Angel, Devil=LE Devil, and Demon=CE Demon? Are these Eladrin Fey who became Celestial, viceversa Celestial who became Fey, or both.
In any case, the 2e Eladrin dont translate straightforwardly at face value into 5e.