Um, it's Arblus, not Orbilis, Baron. Well, at least people making mistakes isn't like THE OFFICIAL SUBTITLES making those mistakes (the spanish subs write "Orbulus"

).
I prefer the Lion version, T-Shot. This one takes the significance out of the song just by changing Unicron for Megatron. Megatron is just another Decepticon, he can't bring "our Darkest Hour", and besides, if the Decepticons were the menace mentioned in the song, there's no reason for "pull together", because it would still be the basic conflict, just 'bot vs 'con, together with nobody.
Oh, and there's my quote for this post:
NobodycangetthejobdonefasterthanIcannobodynobodynobody!