Guess whose local gaming stores did, in fact, have II.8 on the launch date?
DDD HD has no storyline additions, according to the wiki, and I trust myself to improvise if they're wrong, so I am temporarily disregarding that until my 3D muscle memory stops kicking in.
-Advice: Binge the HD ReMIXes and don't even TOUCH 3D if you're gonna play DDD HD. It's so disorienting.
0.2 Birth by Sleep -A Fragmentary Passage- is GLORIOUS, and Kingdom Hearts III is going to be SOOOOO GOOD. The graphics are glorious, the gameplay is glorious, and the Avengers can eat each others' hearts out for buildup.
-Advice: II -> BBS(Aqua) -> 0.2 - in that order