I don't know about canon, but I bet when the OUT is restored and re-released it will be the main selling point of that release. I'm sure they'll include the SE's but the main feature will be the OUT. Basically the opposite of the '06 DVD's where the GOUT was just a tacked on afterthought; the SE's will be more of an obligatory feature they add just to make sure they aren't excluding any people who might buy it. Also, for those who say the OUT won't be a product that sells well, the OT always sells well each time it is released, even when you only got the special editions (people who like the SE's better than the OUT are a definite minority, at least amongst everyone I know), and pretty much all Star Wars fans (SE fans included) would jump on an OUT release because it's been so long since we've seen it officially released (not counting the GOUT, which was just insulting IMO). I think with Disney in charge the SE isn't going to disappear, but it's just going to be a bonus feature, maybe even eventually getting phased out and ignored completely. This is all just my own speculation and wishful thinking, but it seems like something they would do

Also, I say they won't officially retcon the SE's because I think it'll be like the PT, meaning Disney will just sort of distance themselves from it and let us all forget they exist