User blog comment:HazelQuill7445/Awesome fan art/@comment-5717877-20170830200505/@comment-25936766-20170830221732

Those "captions" can offer info on the piece, you know.

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I guess? There were 7 dudes in the linked art, and only 4 of them are confirmed dads.

We don't really have any guarantees we'll get a new Daddy in Vol.5, let alone 3 to complete the piece. And waiting 1+ year(s) just for that would hurt the joke since it would be too late by then.