>>1026101
>>1026107
>>1026113
>Alina corrects Harley much like Joker constantly does
>Joker keeps saying she reminds him of himself as a child
>Joker was shown to have a parental instinct in the first issue when he kidnapped her
>Joker visited her mother 9 years ago and is a much more likely candidate for a one night stand than Bruce who only really had flings with rich women
>Alina's birthmark is in the shape of a diamond similar to Jokers makeup
So it's heavily heavily hinted that Joker is Alina's father then, yeah?