The thing about a legendary ranker's return, especially in LitRPG or progression fantasy, is that it completely reshuffles the established power dynamics, and not always for the better. For allies who've been struggling without their pillar, it's like a shot of pure adrenaline—morale skyrockets, but so does the target on their backs. They might become overly dependent, or worse, get used as pawns in the returning legend's larger game. I've read stories where the so-called 'comeback' ends up exposing the guild's vulnerabilities because the enemy now knows exactly who to focus all their countermeasures on.
From the enemy's perspective, it's pure chaos. Their carefully laid plans, maybe years of work to dismantle the legend's legacy, are suddenly obsolete. But a smart antagonist doesn't just panic; they adapt. They dig up old weaknesses, spread propaganda to tarnish the legend's current reputation, or even try to turn former allies against them by suggesting the comeback is a selfish power grab. The most interesting effect is on mid-tier factions who were playing both sides; they're forced to pick a lane, and that decision often defines their entire future in the narrative.
Honestly, the fallout for the allies often feels more dramatic to me. There's this weird mix of relief, jealousy, and pressure to measure up to a standard they thought was gone forever.