The "man" part of "Nebraska Man" stems entirely from a popular article, and an accompanying drawing, written by an overly enthusiastic British scientist who never examined the actual fossil. The original researchers in America dismissed the British drawing and reconstruction as "a figment of the imagination of no scientific value, and undoubtedly inaccurate".
The only proposal the American scientists ever put forward was that the tooth appeared to be that of an APE (not a "man") which maybe possessed a few incipient human affinities, although the fossil was far too worn to be definitive about such details.
You may be looking at this all wrong. The alleged "discovery" that Hesperopithecus dawsonii was "really" only a pig's tooth might be the nefarious evolution conspiracy cover up; and you've fallen for it! You see an ape in North America would really be evidence AGAINST evolution and for creationism, since apes supposedly evolved in Africa long after the continents separated. Apes should have never been here on the evolutionary scheme!
You mean Henry Osborn went back to the site 2 years later and planted a fake pig's jaw to kill his own discovery? Wow, I never thought of that! You may be onto something here.
After all, they did the same kind of thing to discredit Piltdown Man & his discoverers... :-)