On Thief in the Night first. Yeah, Broadside's first real appearance, who seemingly has no real introduction and seemingly no real connection with the season 1 and season 2 storyline. It looks like the toymakers and not the writers are unquestionably in charge of the show. For my own headcanon, I just assume Broadside was built in a similar manner as the Dinobots but the Autobots now have better personality (including intelligence programming), not that I can recall Broadside appearing to be highly intelligent. With Metroplex, I like to think that the Autobots used the personality component from the Guardian who fought Superion in the War Dawn, but I have difficulties explaining the origins of Six-gun, Scamper and Slammer (although TF wiki says Slammer is just a drone). With Octane, I would like to see him introduced in a series 2.5(as from dialog in Starscream's Ghost, Octane must have got on fairly well with Starscream). On Carbomya, it is interesting that Dirge and Ramjet were there in Five Faces of Darkness. So it would be interesting to explore when the Decepticons first went to Carbomya (especially as in the movie it appears the bulk of the season 2 Decepticons had moved away from Earth some time before 2005). Maybe, there was a small Decepticon operation going on there before 2005. Or Dirge and Ramjet, heard what the Dictator was like before 2005 and thought anything is better than staying on Char. On Thief in the Night the actual episode, as a kid I liked how it was set on earth and there was a real Autobot v Decepticon battle without any Quints. Now I see it as just a light hearted episode but I wonder what happened to Ramjet as he is never seen again in the series.