I'm also having an ongoing Aerialbot dilemma like yourself. Mine's further complicated by my novice-level interest in all things that fly and fire, but this isn't a competition and you don't need me to potentially add to your dilemma.
The MakeToys rumour has been around for a while now I think with little evidence. Plus I read a comment on facebook from someone who claimed to have spoken to their representative at a convention who said they were going to focus on their Cross Dimension and Re:Master lines for the foreseeable future, so breath holding probably isn't advisable.
I agree with your comment that Superion should have a height advantage, but I wouldn't say using the TFC fast jets with Combiner Wars Silverbolt is the way to go. In addition to the aesthetic differences, you'd also have a difference in scale. I don't own the TFC figures, but photos suggest CW Silverbolt might only be a head taller. Lacking the bulk of TFC's Blackbird, I'm not sure the resulting Superion would look particularly awesome. Think FoC Bruticus. As
shajaki pointed out, this is currently your most expensive option, and the end product is theoretical at this point.
I'd also say an upgraded Unite Warriors set is the best option at the moment. It's the one I went for. It's not my ideal solution but, as it appears neither of us are entirely sold on the options available, it's a decent, coherent set that doesn't cost the world, and so won't come as much of a blow if something does eventually outshine it.
