Penalty shootout especially in finals is a life changing moment, it is the moment between happiness and sadness. It is really hard to trust a goalkeeper for moments like this. That's why we always see clashes in coaches choice during penalty shootout, an example is when sarri wanted to remove kepa to put in Cabellero during the FA Cup match.

For me I would trust and choose Mohamed Abou Gabal the egyptian goal keeper. He his good in making decision and doesn't hesitate in diving to the ball. We can see how he saved penalties during the AFCON and I have seen some of his clips where he saved penalties too.
So for me, I would choose him to stay in post in a defining moment like that.