Damian Wayne Returns in Son of Batman Animated Flick

Admit it, you miss Damian Wayne as much as I do and while there's a miniseries running featuring an older Damian from DC Comics, it's still not the Damian we all love. Enter Warner and DC's next animated movie, Son of Batman which retells the now classic "Batman and Son" storyarc by Grant Morrison and  Andy Kubert.

The story was launched in 2006, Batman #655-658 and #663-666 where Batman has to handle his killing machine of a son while cracking a case involving former paramour Talia Al Ghul and her army of ninja Man-Bats (I shit you not).

Here's the trailer:

OK so why is Kirk Langstrom's involvement downplayed? Why did they add in Deathstroke the Terminator here? What happened to Damian Wayne being a cold killer and his voice is terrible... he sounds... weak?

Also what happened to the rocket ship?