My theory is revised--these appear to not be a photoshopped version of the ANH crawl, but a totally re-created version!
First, let me explain. I said before that the coloring of the text and placement of the logo was a dead giveaway--but now i realise it wasn't a giveaway that it was an altered 1981 crawl. It was a giveaway that it is a totally new re-created crawl. Look at these screenshots. The first is the real 1977 crawl.
Okay, next is the DVD crawl from the trailer:
Right, same as before--the main logo should have dissapeared by now but its there clear as day, indicating these are not the same crawls (which is re-inforced by the differences in starfields and text colouring).
But here is where it gets interesting--the 1981 had the logo (pretty much) dissapear before the text came as well, just like the 1977 crawl did. Here is the 1981 crawl from the SE dvd:
You can see in the above that the logo is just barely there--this cap is taken mid-fade. By the time "A New Hope" comes up it is long gone:
See, logo is gone.
So then what is the deal with the DVD crawl? Its not the 1977 crawl but it can't be the 1981 crawl with the episode info erased--this would leave a huge dead space as well. The only way for the crawl shown on the trailer to be possible is if they erased the episode info, rotoscoped each and every letter and word and moved the whole thing closer together. This would be quite the effort to do, and totally unnecessary.
I realise now the reason that the 1977 Empire of Dreams footage was not used was because the difference in quality and starfields would be too troublesome to blend into the 1993 Laserdisk footage. But rotoscoping the 1993 crawl would be even more difficult.
But i figured it out. How do you think the crawls were created for the Prequels? Denis Muren himself did it on his dinky home laptop. Its that easy.
The process goes like this:
-take still of starfield backdrop.
-type text into pre-formatted parameters
-composite
Done. They already figured out what the font is. They already figured out the speed, angle of view and duration. All you have to do is type in the text.
And this, i am positive is what was done. There is blank frame of just the starfield that can be used to make a backdrop. Then they filled in the text. So why is the logo almost overlapping the text? Because they had the speed programmed for the prequel/SE format of crawl, which includes the episode infor--thus, they had to reprogram the speed and compositing of the text. And they were imperfect in their measurements--perhaps they had no reference and just did it by eye, sort of "yeah that looks about right--star wars logo comes in then the text does."
So there it is. If they got the position and speed wrong its probably safe to say that they likely got the original formatting of the text wrong as well and just copied what was on the 1993 laserdisk (ie the 1981 formatting).