Mister Majestic's first non-canon fight occurred when he, along with a troop known as the Numen Revenge Squad, attempted to kill the alien entity known as Numen.

Source: https://www.cbr.com/seven-warriors-mister-majestic-superman-fight-dc/

Still, with 25 official (EON-produced) installments as of 2023, not to mention the non-canon films, it is astounding just how many there are and how enduring their legacy has proved.

Source: https://screenrant.com/movie-franchises-should-have-ended-still-going/

The canon New Republic is heavily influenced by the old Expanded Universe, which has now been branded non-canon (or "").

Source: https://screenrant.com/star-wars-new-republic-explained/