Which issue, if you recall? Also, sounds a lot like a 4e/5e style Eladrin with the Celestial type instead of Humanoid or Fey... maybe take the DMG Eladrin and make it Celestial? Wonder if this article was the inspiration for making Eladrin a type of Elf in 4e?
Not really expecting much in the way of Planescape Celestials returning, but it would be nice if they brought back the Asuras and the Lillend. Asuras to give us a CG Celestial that not shaped like a horse, and Lillends because they are keepers of the Infinite Staircase and can be used in a variety of non-related ways as well. Oh, and not Celestials, but - Dabus, please!