I completely disagree. This is a hail mary play. They are trying to get people who didn't see it in theaters an incentive to actually watch it. By releasing that SPOILER is in the film, all of a sudden it peaks interest in the movie to someone that maybe did have any before. If it sells a few more dvds and gets people talking about it. Its worth it for them. They don't care if it wrecks the surprise.
And on a side note. I didn't think it was a "dumb star wars movie". I liked it a lot and thought it was better then Rogue One.
Not much to go on yet (unsurprisingly) ... apart from this courtesy eBay:-
(May just have been just taken in bad light but the colours sure don't look great and will expect better pics forthcoming to reveal better the oranges and blues).
Can't stomach watching the Special Editions. And an upscale of those poorly color corrected, over-saturated, CGI-obstructing scenes from the original transfers of the Special editions are just going to look even worse.
I also don't think the original Star Wars should be watched in TOO High of a definition just because that original Darth Vader costume does not hold up well with all it's cheap, halloween-esque glory if scrutinized... I learned that when I saw Rogue One and saw how faithfully replicated it's cheap-ness. xD