First of all when it is all said a done there AKA all his DEBTS are paid there is going to be FAR less to fight over than anyone can imagine.
Because DJT is self centered asshole who only cares about himself I assume that for all practical purposes she is not in his will for anymore than she would be getting in the pre-nup you KNOW she signed.
Probably Nothing for Marla, Tiffany is over 18 and in his mind not really one of his kids, not in the same league as Invanka so probably nothing for her either.
Barron, who knows.