I just caught something. While I was watching the Animated episode "autoboot camp", bumblebee tried to bust wasp by using that microphone. Then Sentinel notices an echo so he says "Wheres that echo coming from?" as he looks for the source of the echo. It made me think of ROTF, when sam talks about the "14 galactic convergences it took for the Sentinel Prime expedition to get an echo on it's signal". Do you guys think its a reference to animated?