The stage is set for a LOTR theme, there's very few new moulds TLG would have to make, all that we need now is the Hobbit film and TLG to decide it will make a lot of money for them.
I'm pretty sure it's meant to be a Clone Scout Trooper not the AT-RT trooper.
They're only in CW.
The closed face pilots where cut from the final version of the game Here
There was a generic 327th trooper in the clone BP and the turbo tank but there was also a Commander Bly with a pauldron on, he is not named but it's obviously him.
Look at the two Watto figs in KDM's image which one looks more like a Lego fig and which one looks like a mini action fig? Do both resemble Watto? The first is a great representation of him whilst still been legoish.
This is a great representation of one of my favourite vehicles from Battlefront. Incidentally what reference materials did you use because I've only seen two proper images of it.
Here is my set of Pilot and Engineer heads, I just need to make a cloth body for them all (except some which use the standard armour. What does everybody think before I finish them, accuracy, queries etc.