At their Twitchcon panel this year, Bungie detailed exactly what “seasons” would mean for Destiny 2. While all Destiny 2 players are currently experiencing season one right now, Bungie plans for season two to begin (relatively soon) this winter.
The developer has also made stated they will be launching another Iron Banner and Faction Rally event, although no specific time was given, it was said to be after Destiny 2 launched on PC. Luckily, this happened today, so maybe we will see both of these events in the coming weeks.
Bungie has planned Destiny 2’s year quarterly, meaning fours seasons total. However, they did not detail how long they expect the game to hold water. Especially with games like Call of Duty: WWΙΙ nipping at its heels. They mentioned their first DLC (which was leaked thanks to some who played the PC beta) would also be coming out this winter, right alongside the second season.
Season two will bring the addition of Ice Hockey and the return of the Dawning (both Christmas oriented). You can also chuck some snowballs at each other, along with other Easter Eggs. Also coming along with these seasons are exclusive emotes, cosmetics, and gear specific to that season, which you can only obtain during that season.
Clans progress will be reset “so that smaller clans have a chance vs only larger more active clans to dominate. Keeps everything on a more fair level.” The perks you can earn for your clan will also change each season.
The reasoning for all of this? Bungie stated it was to make “more predictable time tables.” So players know what to expect and when. Also, so you don’t feel like you have to play Destiny 2 all the time. Instead you can “pace” yourself and show up for certain events when you want to. You can read more information about the seasons on this Destiny Reddit post.