One reputable Japanese website mentioned that Jujutsu Kaisen (呪術廻戦) x PAD collab was mentioned on the latest volume of Shonen Jump.
…Latest PAD Japan server News
Stream scheduled for 7/12 (Mon) 8:00pm JST
Oh my god all diamonds. Updated with buffs now!
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Event happened on NA server.
Permanent addition starting after: 7/5 (Mon) 12:00am JST
Event happened on NA server.
Live sometime after 7/6 (Tue) 12:00pm JST
Typhon fans rejoice?? Celebrating birthday of PAD illustrator, Saichi (@saichi256), which is on July 6!
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7/5 (Mon) 12:00am - 7/18 (Sun) 11:59pm JST
7/5 (Mon) 12:00pm - 7/11 (Sun) 5:59pm JST
7/2 (Fri) 10:00am - 7/9 (Fri) 11:59am JST
Upcoming weekly PEM rotation! The Pal Egg Machine will have a short rotation to Enhance Materials!
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7/2 (Fri) 12:00pm - 7/9 (Fri) 11:59am JST
Weekly rotation of Rare Egg Machine lineup that is already live because I forgot to update, featuring Three Kingdoms 2 & Indian 2 series!
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Been a while, but… which machine? (Spoiler: he didn’t say)
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Event happened on NA server.
Live sometime after 7/2 (Fri) 12:00pm JST