Well, that leaves us all a bit blue... er... something. Family site and such.As noted earlier in the thread, figuring out the comparative speed is a little hard to pin down to my mind.
Composite Man has Superman speed which is "decent bullet timers are slow motion to me," shown in the Justice League fight.
Give me a sec to just try and parse out out the algorithm as it pertains to Luffy and we'll see. As with most manga and anime, there's going to be yardsticking in there. This won't be complete as there are like 980 odd chapters of One Piece and I'm sure I'm forgetting some things but we'll go for broad strokes.
- Early Luffy, pre timeskip, already had quick reflexes as discussed earlier in the thread with Kuro. A good example of his combat speed is his combat with Zoro on the island of Baroque Works. Zoro fights a small army of assassins and has lots of moments of vanishing from view through speed, covering large distances and effortlessly blitzing groups of people. He ends up fighting Luffy later that day and the two of them are pretty evenly matched, the two of them both taking out other fighters attempting to interrupt them instantly at the time in the same manner.
- Later Luffy gets feats of intercepting/dodging bullets, as does Zoro which show up in the Skypeia arc IIRC. Again, the two of them are presented as pretty even in speed pretty consistently.
- Enter CP9 who blitz Luffy and co with their superspeed technique called Soru. Full on disappearing from view and so on.
- Luffy then just gits gud and can now hit them out of said movement in his base form. He also unlocked Gear Second at this point which greatly amps his speed which makes him able to blitz said users of Soru.
- Luffy and co then have trouble with Pacifista, as described above, and we hit the timeskip.
- Post timeskip Luffy is able to blitz Pacifista with ease and also dodges lasers/plasma blasts commenting how slow they are.
- Luffy fights Katakuri and gains control over his precognition. He had used his precog in small ways, usually when faced with much more powerful foes and the like but I believe he has a handle on it now.
I don't think there have been any specific upgrades recently that I'm missing... others feel free to correct me.
So, assuming that DCEU Wonder Woman is like... equivalent to say Skypeia arc/Early Water 7 arc Luffy/Zoro. That's like two or three major upgrades to Luffy's base speed/reactions (Matching Soru/Timeskip Boost/Precog) not counting enhanced forms (Gear Second/Gear Fourth). I don't know if that's enough to replicate the distance between Superman and Wonder Woman because it's rare to find something as clean as a full on slow motion sequence.
I guess I leave the beginning of that basic hypothesis in place: if Luffy can blitz, he takes it. If he can't, he gets esoteric'd and loses.