I second lucari's post. And also, I have no idea if it will turn out well for the HD version.. There are plenty of DB fans out there but I doubt most of them will want to watch (for the second time) battle scenes where the protagonists take 4 episodes to charge up.
I do remember that episode. As I child, I was pretty disturbed after watching it.The main question for me would be more about censorship. Considering the amount of violence in several episodes and the changes since 90s of the "rules" in Japan about what is allowed to show on TV screen (Gantz comes into my mind), who knows what will be cut out or not. I'm not saying there are rules, but japanese channels apply self-censorship nowadays, it could be like on the erotic/fanservice shows.
Check episode 79 to see what I mean by violence. Anyway it's for Japan only ...
As I expected, they have put down the violence factor compared to the original series, and there is less nudity (for the rare appearances of naked Goku in flashbacks from Dragon Ball era) too ...
This is an example of what can be improved (correct colors for the first appearance of Vegeta) or not (much less bloody stuff) with remastering treatment:
http://ranobe.sakuratan.com/up/src/up353278.jpg
It's clear that this series is close to zero-interest for me.
Censorship doesn't really matter because you know once they release these episodes on DVD in Japan they will be uncensored.