Was Megaman 6 Supposed To End The Classic Megaman Series?

I remembered checking out the chronology of the release of Megaman games. If you noticed, the first Megaman X game was released for the Super Nintendo after Megaman 6. The ending of Megaman 6 showed us that at long last, Dr. Wily was arrested by Megaman. Megaman 6 was released on November 5, 1993 and Megaman X was released on December 17, 1993 under the Rockman title. Megaman 7 was a game that was released after Megaman X3. I call these games as the " prequel games ". I gave a thought on it if Megaman X became more popular than Classic Megaman then why was the latter given more games after X6? My speculation has to do with this one: Megaman X2 and Megaman X3's plotline called for it. If Classic Megaman just ended with X6 then it'd be difficult to provide explanations for plot in X2 and X3. X2 reveals a bit of a puzzle where Sigma says that Zero is the last of the "Wi... numbers..." and X3 reveals that Megaman X will one day have to fight Zero. It wou...