Update: You can watch DreamHack Arena Open Anaheim now:
Watch live video from Magic on www.twitch.tv
DreamHack Anaheim Arena Open is happening this weekend —February 21-23, 2020—with $100,000 in prizes, and a chance to qualify for Mythic Invitational Ikoria. The Magic: The Gathering Arena tournament requires a valid ticket to DreamHack Anaheim to register, and the tournament is capped at 350 players. The tournament's format is traditional best-of-three Standard Constructed, and it will be Swiss with a Top 16 double elimination playoff.

Here's the prize pool:

The winner will also qualify to play at the Mythic Invitational Ikoria at May 14-17, 2020.
The broadcast team includes Admirable, Riley Knight, Maria Bartholdi, and Martin Juza.

Here are the tournament rules:
DreamHack Arena Open Anaheim will be shared on the official website, and you can watch the live broadcast of the tournament at Twitch.tv/magic.
Related: Thief Who Stole Magic: The Gathering Cards Was An Inside Job, According to Police