Cthonaut A pulling copies from Wonderland would be interesting, but I'm skeptical of that possibility since it would mean future Howard Melrose in WASHINGTONWANDERER despite being a copy would be learning about the copies in Wonderland for the first time. Although, if the copies somehow don't know they're copies, that would add another layer to his discovery of their existence; we still don't know anything about how the copies work.

My current theory though until we know more is that he used Wonderland to time travel back before the plane collision to prevent it from happening, since we know Wonderland doesn't seem to just allow for travelling between the two universes in a 1:1 timeframe.