If D4 goes the season route I’d like to see them develop a nice cadence, for example:
- Season 1 - Balancing and new items added to the game patch. Max keyed dungeon level increased by x and new keyed dungeons affixes added to the game.
- Season 2 - New story addon. A story addon is a really long quest that tells a story that leads to some new place in the game with a chance at awesome loot. If uniques/legendaries drop infrequently in D4, then these repeatable (semi-random) story quests in D4 that could drop 2-3 guaranteed uniques/legendaries at the end would be worth doing (balanced of course against other game system reward structures). I wrote about this in another thread below.
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Season 3 - Community Event. D4 team comes up with a race or some event in game that they track through leaderboards. The whole community participates in it - similar to PoE race leagues. They don’t have to be races though, they could be a special challenge mode of an endgame dungeon, but still something competitive. The community event could be a new PVP tournament.
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Season 4 - A new endgame mode is added to the game permanently. This would be the most content from any of the 4 seasons and include some new items to chase in this endgame mode (but these items shouldn’t obsolete all the normal items in the game).
Then, the next year they repeat this schedule with the same cadence, so players always know the first quarter of the year is balancing the game, second quarter is new story content, third quarter is a community event, and fourth quarter is a new endgame mode. The season challenge/journey system can be brought alongside each of these to give players a roadmap for seasonal content.