Brendan was recently at the centre of hard-hitting scenes in E4 spinoff Hollyoaks Later, which included the revelation that he was sexually abused by his father as a child.
Speaking in a new interview with the Daily Star, Scanlan continued to hint that Brendan's story is heading into its final chapters.
Scanlan commented: "I said to Emma Smithwick when she took over as show producer, 'Can we take him to a really dark place? I want to break boundaries'. She had already thought about that. She championed Brendan. She pumped blood back into him. What's going to happen in the last furlong is down to her.
"Brendan has reached a point now where there's no return. I think he's on his last legs. It's either become the man or get lost."
He continued: "Hollyoaks Later was the end of Brendan. You can't come back from that. I don't want to fall back into old patterns.
"It's time to Brendan to evolve, to sacrifice himself on the cross or to bow out."
Brendan will feature in even more dramatic scenes next week as twisted Walker follows through with his threats to target his loved ones.
Hollyoaks airs weeknights at 6.30pm on Channel 4, with first look screenings at 7pm on E4.