I got about 10,000 dust.
Plus the 3,600 dust of next week's Vanguard, Crucible and Gambit weekly bounties, it will be 13,600 dust.
Plus the, I can only assume it will be 1,200 dust from the Festival weekly bounties, it will be 14,800 bright dust for week 1 of the event.
I could have more, but apart from this week I couldn't get myself to play strikes and Gambit.
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I have a little over 117,000. I went into shadowkeep with 175,000;)