I like your picks for the characters that didn't already appear (and speak) in the first film. We don't need a reboot to have Morena Baccarin as Katma Tui, Zach Galifianakis voicing G'Nort, Willem Dafoe voicing Salaak, Terence Stamp voicing some stand out Guardian such as Appa Ali Apsa or Ganthet, Common as John Stewart and James Earl Jones as Legion. I like Ryan Reynolds as Hal Jordan, Mark Strong as Sinestro, Michael Clarke Duncan voicing Kilowog, Geoffrey Rush voicing Tomar-Re, Taika Waititi as Thomas Kalmaku, Blake Lively as Carol Ferris, Jay Sanders as Carl Ferris and Temuera Morrison as Abin Sur. I'd much rather see sequels moving forward than a reboot covering Hal Jordan's origin again. As Bruce Timm has said, "Weve already done the origin story in New Frontier and First Flight, and the live-action movie itself is his origin story, so people know Hal Jordan's origin story and we don't have to waste time with it yet again."