I thought some more about it. Since the effects were done on video and they have to reassemble the episodes from raw material anyway (since probably no film master copy without effects exists) they save the time and money for rotoscoping, right? Finding the right takes of every episode and putting them together shouldn´t be that big of a deal? Surely there´s some kind of document where they noted down wich takes they used?
Indeed, from what I have read this seems to be the case. In fact, the edit information might have been noted directly on the raw film parts. Thus if they have the original film material they also know how it needs to be edited. However, I do not know how conistently this notation was done. Nonetheless, even if they didn't have the documentation, all they would need to do is employ a few dudes to go through every episode and compare them with the raw film parts to get this information. Surely that wouldn't be the money sink of this project?
How much would that cost? And would they make a profit? Has anyone here put the standard DVD in a blu ray player and seen the results on a HD screen?
Depending on your blu-ray player you could get a very decent image but certain images like CG shots and some other special effects don't always transfer so well even on the best blu-ray player, if you want a really good image for HD you have to render them in HD.