One thing I'm trying to cement is the extent of Palpatine's on-screen time. I've already decided to *not* show him using his Force Lightning ability, at least not in the way we see it used in ROTJ. Perhaps he puts his hand on a control panel and sends a surge through it, crippling power to an entire facility and trapping our heroes in some kind of dangerous and seemingly-impossible-to-escape situation.
This occurrence only has the proper narrative precedent, though, if it is established that these prequels are meant to be seen *after* the OT. Same goes with the parentage revelation.
The way I've written it out, there is no need to show the birth of the twins, their placement on the two different planets, or even the cocooning of Anakin inside the suit. Also, I require *some* justification for why the name Darth Vader is chosen for Anakin's alias, otherwise I will skip that scene too.
I'm trying to tell a new story in the Star Wars galaxy that also happens to set up the OT. But the things that happen in this PT ought to make good enough sense on their own, too, not simply "my character exists solely to fulfill this one prerequisite to set up this one background condition for the OT".
The point is to have the consequences that set up the OT emerge organically from the chronicle being told in a remade PT, not simply going through the motions of a space opera story in order set up the bowling pins that will inevitably be knocked down by Hamill, Fisher, and Ford. While that may be a byproduct of a remade PT, I'm trying my best not to make it the sole end.
As for inter-trilogy connections...I think GL went too far in all the wrong places. I'm trying to write this PT so that there are bridges between the trilogies (other than the obvious fact that one leads to the other and they take place in the same universe)...but either one can almost feel like its own little self-contained series. There's a different overall journey being undertaken in either trilogy. Also, only three characters "diffuse* from this trilogy to the OT (Anakin, Obi-Wan, and Palps).