I was reading the latest preview for Horrific Journeys, and I noticed the screenshot of the tablet for 10:50 to Arkham
identifies it as the 15th scenario out of 22.
I own all DLC and expansions to date - which is only 16 scenarios in total.
Add the three from Horrific Journeys and you get 19 in all.
22-19 leaves three unaccounted for, is this a new expansion or DLCs I wonder