https://www.gamespot.com/articles/destiny-2s-new-iron-banner-event-kicks-off-next-we/1100-6462500/

Destiny 2 is bringing back the Iron Banner, starting very soon. The event begins Tuesday, October 16 and lasts until the following Tuesday, October 23. It will be accompanied by the 2.0.4 update, which among other changes will update rewards and bounty objectives as a response to feedback Bungie has received from past Iron Banner events.

For starters, it will be much easier to get good rewards out of the Iron Banner. The bounty requirements have been significantly reduced, in some cases even halved, to make them easier to complete. On top of that, you'll get a piece of Powerful Gear for each bounty you complete, to boost your overall Power rating. Finally, Masterwork Cores will be made more available, with Double Valor rewards October 16-19, and Triple Valor from October 19-23. Check out the newly revised Iron Banner bounties below: