POE2 Will seasonal content be removed eventually?

Sorry I couldn't find any information regarding this.

For example will the rise of the abyss content stay forever or will it be removed next league? Or there'll be a rotation of every 3 leagues there's a reset?

My probably miniscule feedback would be not to leave every league content in the game because it will become extremly bloated.

League content always stays but it's getting reduced in frequency, right now there's an abyss in pretty much each map, it will be much less next league and the next league content becomes the thing that almost always spawn.