I have no idea how to do the black spoiler cover things so if you haven't seen the episode Crossfire(I think we all did) then don't read. There is a thread about how the ending of Crossfire with the massive Insecticon hive(I literally went ''holy shit!'' when I saw all those Insecticons lol) is a hint at every ones favourite 1 eyed scientist making an appearance on the show. My idea is that Airachnid was the result of an experiment by Shockwave to combine the DNA(or whatever Transformers have) of a Cybertronian with that of an Insecticon to give them insect like abilities(webs etc). Shockwave arrives on Earth and has the ability to control Airachnid and use her to do what he wants. Shockwave forces her back into helping the Decepticons thus giving Megatron a massive Insecticon army.