At the end of The Matrix, Neo, with his newfound powers as The One, jumps into Hugo Weaving’s Agent Smith and destroys him. So it came as quite the surprise to see this villain return in the sequels and turn out to be the final boss of the entire trilogy. We don’t yet know if Hugo Weaving will return for The Matrix 4, but given that Neo and Trinity were both dead at the end of The Matrix Revolutions, alongside Agent Smith, it seems possible he could.
Article source: https://www.cinemablend.com/news/2478500/5-things-we-need-to-see-in-the-matrix-4