The most reasonable unban is legitimately bloodbraid elf. Only Jund and zoo can play it, in Jund it hits a discard spell/creature/removal most of the time which makes it a worse thought-knot seer/sorcery speed collected company/nekretall. It will rarely hit a Liliana/ancestral vision. Shadow decks wouldn't run it over Ranger of Eos since Ranger gets two shadows. Zoo and traditional Jund could use the help and maybe a Rug deck gets made.I think the idea is that they don't want Modern to be a combo paradise.
Modern right now is one of the best eternal formats that they've ever had. DS isn't getting banned and nothing is getting unbanned.
The most reasonable unban on the current ban list list is legitimately Jace, the Mind Sculptor.