I wonder if they would bother to fix the Wardens Keep/Awakening glitch in the SE(if it is even included of course). It would be rather hard to try and "fix" it when Wardens Keep would be on the disc and can not be erased(meaning Sentinel and Vigilance would be permanently glitched). They gave some BS excuse why they can not patch it but with this rerelease maybe they could. Hell be a nice time to clean up a lot of glitches but I know I am asking too much there.
If they include DLC, I think it would be like the ME Platinum Hits edition, FO3 GotY and Oblivion GotY, where you just install the DLC from the disc, or like the RE5 Gold Edition, which just lets you download the content for free, so you would still have a choice of what DLC you have on your HDD.
I highly doubt it would be incorporated into the game, which is how I'm interpreting your post.
P.E.T.A.-People Eating Tasty Animals "All God's creatures look best next to the mashed potatoes & gravy."