As much as it may seem to be that Nicholas and Perry's role as major players in the final battle are over, somehow I still think that they have a bigger role yet to play than simply to destroy the scourge of monsters that are about to lay waste to the City by the Bay. The series is named after one of them let's not forget.
I default to director Jerry Bruckheimer, who when asked at the time about the similarities between his upcoming blockbuster Armageddon and the previously released Deep Impact he said,
"In Deep Impact Robert Duvall leads a team up into space to try and stop an asteroid from hitting the Earth, an unfortunately, he fails."
"Armageddon stars Bruce Willis, he would never let that happen."
Somehow I think Nicholas would agree.