Someone posted a pic of the two Criterion boxes at their local Costco on Instagram and it looks like A Hard Day's Night is in a plastic case (which means the 78-page booklet that comes with the dual-format release is not included in this gift set)
A picture of cover art for the boxes has been posted at the Blu-ray.com forums. The Hitchcock set is the four they've released on Blu-ray (The Man Who Knew Too Much, The 39 Steps, The Lady Vanishes, and Foreign Correspondent) and the price for these sets is rumored to be $59.99.
Ryan Gallagher of Criterion Cast tweeted that, coming in November, Costco will have two Criterion gift sets: a Hitchcock set and a Rock and Roll Set (A Hard Day's Night, Quadrophenia, Gimme Shelter, and Monterey Pop)
According to some posts at the blu-ray.com forums some more $19.99 Criterion Blu-rays are showing up at Costco:
Moonrise Kingdom
A Room with a View
The French Lieutenant's Woman
Dressed to Kill