In this month's Futures End #44 (March 2015), there's a scene where Superman punches Brainiac SO HARD that...something happens to him. The page shows multiple versions of him; I don't know if these are Brainiacs from alternate earths or from Hypertime or both, and I don't know if the're actually appearing or if it's more symbolic, but it doesn't really matter. What does matter is who shows up.
In front, we have the Brainiac getting punched. Behind him is the New 52 Brainiac (I don't know how they're different; I assume the Futures End Brainiac is from the future), then at the end is the original Brainiac from the 50s, ahead of him is the "New Look" Brainiac from the 70s, and in the middle - for whatever reason - we have the Brainiac from Superman: The Animated Series (1997).
head symbol, but this is the first time he's appeared in full. And again, this could be the Brainiac from either Earth-12 or Earth-50, or just from some alternate timeline where Superman: The Animated Series happened, or something else entirely (maybe it doesn't really mean anything and the artist just likes this style of Brainiac), but it's in there either way.