This is the schedule for the upcoming event:

We're going to ignore literally everything, except for second event on the right column:

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11am, 3pm, 7pm - Arkham Horror 3rd Edition with Developer Phil Henry

Meet developer Phil Henry and experience dread in the Dead of Night! Phi will also be running the Arkham Nights-exclusive scenario Gates from Beyond, at 7pm.

What the heck is the Arkham Night-exclusive scenario Gates from Beyond ? Are we getting an exclusive scenario?

Or, if I read the article proper:

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Not only will Arkham Nights 2019 feature playthroughs and demos of your favorite Lovecraftian games, the event will also offer you the chance to meet some of their designers! Returning special guest Richard Launius will be playing games with participants throughout the weekend, running the gamut from his original version of Arkham Horror to a brand new, exclusive scenario for Arkham Horror Third Edition , Gates from Beyond! There will also be opportunities to play with developers throughout the event, including Mansions of Madness with Amudha Venugopalan and Grace Holdinghaus, and Arkham Horror Third Edition with Phil Henry!