"It's the revenge of the Tropers!" and similiar phrases are said at least every five minutes.
Charlie, who has a Heroic BSOD, sobs "It's the revenge of the Tropers" repeatedly.
Downplayed: At one point, it's said "are the Tropers planning revenge?".
The work's title is something with an important role in the story. Bringing it up is natural.
The work's title is a common word/phrase, at least In-Universe. It's natural that someone will say it.
The work's Working Title (not final title) is mentioned in the work.
A line from the work is mentioned in the title.
Subverted: "It's the revenge of the ... troops!"
Double Subverted: "Do you mean the Tropers' troops?" "Yes, it's the revenge of the Tropers' troops."
"It's the second war against the Tropers, right? And now they want revenge, right? I know what we should call it! It's 'Troper Wars II: The Revenge of the Tropers'! That would be an awesome movie title!"