Eph 5;5 is a bonus.
We see the kingdom of Christ/God/heaven all the same thing
Matthew 25:14-30 talks about the Kingdom of Heaven where an unfaithful servant goes to hell.
Luke 19:12-27 talks about the Kingdom of God where the unfaithful servant loses his rewards and this matches up with the Christian at the Judgment Seat of Christ(2 Cor. 5:10). There is obviously a difference between the two kingdoms.