Endless amount of options still in the last round of this group.
Default is Belgium wins Finland so that leaves Denmark-Russia to determine the remaining order. Unfortunately I can't see a scenario where Finland would get even a point from Belgium as De Bryune is back in the game and Martinez confirmed most likely De Bryune (and E.Hazard and Witsel) will start the last match.
Denmark-Russia 1-0 => goal difference in Finland-Belgium (given Belgium wins) will determine 2nd, 3rd and 4th
Denmark-Russia 2-0 => Denmark, Finland, Russia
Denmark-Russia 2-1 => Denmark, Russia, Finland
Denmark-Russia 3-1 => Denmark, Finland, Russia
Denmark-Russia 3-2 => Denmark, Russia, Finland
and so on...