So even if the new Fusion does have a digital preamp, there is nothing to say that it won't be a killer amp.
My understanding, that I could be totally wrong about, is that there could be upwards of 3 different versions of the new amps - a Plex digital version, a tube-pre "fusion" version, and potentially a full solid-state version ala classic GK. All three different versions using the same chassis.
Hard to say with any certainty how accurate that is, but if it's true it seems like a good marketing move to cover all their bases.