Correct.
Not quite... it's DOTM Soundwave, but not Human Alliance.
Correct.
Correct.
Right you are.
Well... it's the Encore reissue, but your answer is close enough, I'll accept that as right.
Correct.
Correct. Heeeey, I like MW Soundwave.Better than Action Master or Beast Wars Soundwave... and at least his gimmick wasn't gutted as badly as Optimus Prime's -- I think his scope gimmick still works with the Predator jets (unlike Starscream's).
Correct, but there's someone else even MORE hidden/obscured than that! (like, you literally can barely see him. And he's not the Soundwave/Soundblaster character but he is a TF toy).
Correctomundo.
This confused me for a moment... I thought you were saying Prime Soundwave and RiD Soundwave, and I thought, "There's a RiD Soundwave??" and I started checking TFwiki but realised you mean TFPRiD Soundwave!(silly Hasbro for not using a more imaginative sub line name!) But right you are.
Smallest Transforming Transformers Soundwave, yes. (I'll accept WST as it's a commonly used fan-term (though not the official name for the toy line)
So you've gotten 11/12 correctly identified, and the "mystery hidden" Transformer remains unsolved!! Ooooh!
Now in fairness to Bidoofdude who's come so close, I'm going to "lock" this question for him. This means that noone else is allowed to attempt to finish answering the question for him -- he has the remainder of the "grace period" to correct his answer and get the full mark for the question.
The Bonus Question however remains unanswered, so anyone can still try to answer that! (remember, look at the photocomic!)