I like the general idea of "moving beyond" with interstellar or transgalactic imagery. The association to protostar is perhaps a bit too subtle unless explicitly stated. And protoshares is trademarked, so Invictus will not use it in the next promotional wave. Perhaps we'll end up with protobitshares, but if not, they might decide to rebrand it as BitShares PTS or perhaps something else entirely.
How about something like this idea?