Fromundaman
I write too much.
Well, I know you play against Batman and WW, both of which jump over our D2, requiring us to delay it (I don't even try to AA Batman with D2 anymore since while possible, the timing for it to beat Batman's ji2 is ridiculous and it's easier to just j1 him). Other characters I know from the top of my head that do are BA, DS and all airdash characters (But if you wait until the AD ends then D2, it will beat out all AD characters' falling aerials, except probably traited martian). Some of these characters can be AA'd with D2 on reaction, but require specific timings, some cannot be AA'd with D2 (Deathstroke I think and probably traited martian; not sure who else) and others still require a really strict timing (Like Batman) that's not really practical.@Qwark28 and @Gilbagz
Thought on d2 consistently AAing?
I feel that it's insanely variable, as I whiff it all the time even when I make good reads and on reaction even when the crowbar seemingly passes through the opposing character, and it makes me punch myself in the head with great vigor (just ask @DarthArma, @Frantastic23, and @Abbneto). But there does seem to be some disagreement here, so it might just be my meta using characters that get around it's aerial hitbox easier than others, so we should probably talk about it in more detail. It'll help inform what I say about it in the guide video (piecing it together when I find the time!).
On the other hand, characters like Raven, all the large characters, Harley Quinn, BG and Shazam are easy as hell to AA with D2 and can often be done on reaction.
Characters like GL, CW and NW can be AA'd with D2 fairly easily, but the truth of the matter is they will rarely ever allow you to do so.
That said, against characters who CAN'T jump over it and can't easily outrange it, that move is a cancelable long-range wall that can AA if they tried to leave the ground.
Fun fact: You can knock MMH out of OH teleport with D2 for a full combo, but the timing is ridiculous to the point I doubt we will ever see it done in a tournament ever.