basically megatron got killed and that wound up the deceptacons so they sent all of them down to kill everyone and everything, thats alot of the story from what ive worked out up to yet, im trying to work out what the big deceptacon is, at first on the rubbish quality i thought it was the original scorpnok, ie had one when i was 10yrs old and loved it.

But now here it maybe there version of devastator so not sure, here below is the old scorpnok, it was huge!!