If they do add him, they should make Kratos his rival, they have so much in common. I'd love if they made Kratos his Minion, but that sounds a little far-fetched, he'll probably get Kratos as his Minion.
If Kratos isn't picked, at least they'll let Kratos in. Maybe he'll have his Ascension moveset, for 5 Kratos dollars. How do you earn Kratos dollars? You simply have to Kratos with your Kratos, but be careful not to accidentally Kratos.