After your first message I put this on the talk page, but you maybe didn't have time to read it before the article was deleted:
If you want detail about why it is historically nonsense: York and Lancaster were branches of the house of Plantagenet, competing with each other but not with some independent "Plantagenet" faction. The house of Tudor was descended (maternally) from a branch of the Lancasters, who did not survive the wars. The first Tudor King, Henry VII, came to the throne by winning the Battle of Bosworth in 1485, which was Tudor vs. York. The next year he married Elizabeth of York which helped legitimise his claim to the throne; but any tensions in the next few years were Tudor vs. York, not Tudor and York vs. "Plantagenet assemblies."
Research: I read the articles Plantagenet, Tudor dynasty, Battle of Bosworth, Henry VII of England, Elizabeth of York, checked the links  and a few on-line sources about Norton Canes, and off-line checked A.R.Myers, England in the Late Middle Ages, p.185, which lists risings and disturbances from 1486 to 1497 but does not mention this, and C. Ransome, A Short History of England, p.173, ditto.