Update: The first one is already live. Here are the full patch notes from Nintendo's official support page:

Ver. 2.0.0 (Released February 9, 2022)

New Difficulties Available
  • "ROOKIE MODE" has been added to the game. This is a mode suited towards new players, with the following adjustments:
    • Dropped items from enemies now replenish greater amounts when picked-up.
    • Damage received from Boss attacks has been lowered.
    • Destructible Boss projectiles have been made easier to break than usual (excluding some attacks).
    • Increased number of missiles available when beginning game.
    • Made the finishing counters when defeating some Bosses easier to perform.
      • Selected when starting a New Game, and choosing "SELECT DIFFICULTY".
  • “DREAD MODE” has been added to the game. This is an extremely high-difficulty mode, where any damage taken from enemies or traps will lead to an instant Game Over.
    • Can be selected after clearing HARD MODE, when beginning a New Game, and choosing “SELECT DIFFICULTY”.
New Details Added to Results Screen
  • Several new details have been added to the results screen that appears after clearing the game. These new details will not appear, however, for game files that were started prior to updating the game.
General Fixes
  • Fixed an issue where Samus sliding down a surface and touching a frozen enemy would force the game to close, after the message “The software was closed because an error occurred” appears.
  • Made several other fixes to improve playability and enjoyment of game.
Demo Update

The following updates to the “Metroid Dread DEMO” are also now available (Ver. 2.0.0).

  • The scale of the playable area has been expanded, with the Corpius boss fight now being available.
  • Added “ROOKIE MODE”, a mode suited towards new players, where dropped items from enemies now replenish a greater amount, and bosses’ attack power has been lowered.
    • Added “SELECT DIFFICULTY” options when beginning the demo.

Original article [Wed 9th Feb, 2022 22:55 GMT]: Metroid Dread is getting free updates introducing new modes for both hardcore veterans and newbies, and the first one drops today.

Dread Mode is a new super challenging one-hit-kill mode. Alternatively, Rookie Mode increases health recovery and makes the game more approachable for players new to the series. The demo of the game will also be updated with both these modes.

A second free update is scheduled for April that will add a Boss Rush Mode.

The update was revealed on the Japanese Nintendo Direct Stream a little earlier than the European and North American streams, but the English trailer is now available (see above).

Screenshot 2022 02 09T223310.208

Let us know below if you'll be making use of these new modes.