So I just found out that Garen, Sona, Zed, and Vi are still dead...

Nope, they were never dead to begin with.

But they were never dead. It was all in the imagination of Jhin.

still dreams about how he is going to murder them >:D

Yeah its a bit odd how riot doesn't seem to want to remove the teasers for and . I mean Aurelion still talks in aram,even though he is already out.

Might be related to technical issues though.