@NeverarGreat: No, it's not connected to the Lucas Prequels. This trilogy is only meant to be canon with the OT and with the sequels that I am writing in a different thread. The events in this universe that transpired in Clone Wars/Republic/pre-Imperial times are implied to be different than what we saw in the Lucas Prequels. But I make it a point to never actually go back that far on screen (with the possible exception of brief flashbacks).
The Rebels are *an* enemy in this trilogy, and so is the traitorous Moff, but there is another threat in these films that eclipses them both. I don't want to give away what it is just yet.
At this point, Vader appears to me as bald and pale-skinned (almost albino). He has a tall and intimidating build even before donning the black armor seen in the original trilogy. His enhancements consist of a biomechanical arm, numerous synthetic organs that drastically outperform their natural equivalents, and a spine encased in a durable but flexible alloy.
The metal can be seen rising up from the neckline of his black cape and entering the back of his skull, where I imagine it would directly interface with his brain stem. This creates a distinctive look even from behind.
On the chest strap covering his armor is inscribed a series of runes from an extinct language.
More story summary to come.
EDIT: While I definitely won't be including any Lucas PT characters in this trilogy, keep an eye out for a select few people from the OT popping in for appearances later on.