Many large games no longer receive sequels and instead release recurring seasons of content. The change follows from what a sequel does to an existing community of players.
A sequel splits the player base
Multiplayer games depend on having enough people online to fill matches quickly and at a similar skill level, and that population is the product as much as the game is.
Releasing a sequel divides those players between two titles, and both versions become worse, because a thinner population means longer waits and poorer matching.
A season updates the existing game instead, keeping everyone in one place while still delivering the novelty a sequel would have provided.
Progression cannot easily be restarted
Players accumulate unlocks, cosmetics and standing over years, and a sequel either discards that investment or has to carry it forward through complicated migration.
Discarding it is a strong reason not to move, so the sequel starts by asking its most committed players to give up what kept them engaged.
Seasons create a predictable rhythm
A fixed cycle of a couple of months gives players a reason to return on a schedule and gives developers a repeating production calendar to plan around.
Each season carries a themed set of rewards earned through play, which converts continued attention into visible progress that expires if unclaimed.
That expiry is what makes the model work commercially, since it establishes a reason to play now rather than eventually, without requiring anything to be sold directly.
Revenue becomes continuous rather than periodic
A traditional release earns most of its income in the weeks after launch and then declines, which makes studio finances lumpy and hard to plan.
Seasonal titles earn steadily throughout the year, which supports a permanent team rather than the cycle of hiring and dispersal that project-based development produced.
The costs of the model are real
A continuously updated game must run its live service indefinitely, and when that ends the game usually becomes unplayable rather than simply unsupported.
Development is also constrained, since fundamental changes risk destabilising a game people already play, which pushes teams towards additive content over reinvention.
That constraint is why genuinely new mechanics tend to arrive slowly in live titles, and why the sequel has not disappeared so much as become a last resort.