Just watched the latest episodes, and my first thought when the Decepticon warship was infused with Dark Energon - they were going to introduce Trypticon (because DE brings things back to life). But then I thought... surely I would have heard about it online or at BotCon by now, because there would be demands for a toy.
As the episode progressed, I started thinking that it was either Megatron or Unicron's personality that had taken over (like the Starscream Clones), but even that didn't end up being confirmed as the case... so I think it has been left up to fans or a future episode to determine who or what that was speaking.
A couple of plot holes though...
- the air strike should have occurred automatically the second the ship crashed.
- how can that big ship (or the insecticon swarm in the episode before), not be seen by humans after all the years it has been on Earth? It's only invisible to scanning/radar, not invisible to the eyes.
- Ratchet should have destroyed the computer with the Iacon database on it. Even if they have a copy elsewhere, the recent search results may have been lost, giving the Autobots the advantage.
Again, so much cybertronian junk on Earth - ships, artifacts, insecticons... it's like their planet is 5 meters away, and we're their wheelie bin.