>>8337637See
>>8337576>>8337627There was enough time between the production the seasons of Beast Wars for Japan to crank out two full series to fill the gaps. II takes place in the far future of Beast Wars and is more of a general sequel, while Neo's plot rides off the events of II's finale.
They're not canon to English Beast Wars, but they are canon to Japanese Beast Wars. As Beast Machines wasn't even made yet, it wasn't a factor in the plots. Japan didn't get a dub of Beast Machines untill, like 2006 or something like that, but they slotted it into their BW timeline as normal.
In short, the English BW universe goes:
generic unseen G1 >>> BW > BM
While the Japanese continuity goes:
G1 cartoon, sans season 4 > Headmasters > Super-God Masterforce > Victory > Zone >>> Beast Wars > Beast Wars Metals (BW seasons 2-3) > Beast Wars Returns (Machines) >>>>>>>>>>>>>>>>>>> Beast Wars II > Beast Wars Neo