Malcolm is 'Macbeth'

Malcolm could present themes of kingship and injustice as he conveys them by certain means.

He is Duncan's older son therefore heir to the throne and ends 'Macbeth' in Scone, Scotland where a king's coronation often took place. The traditional nature conveys the peace and righteous end of the play.

Shakespeare presents MALCOLM as xhonest and wise through the use of dramatic irony. Malcolm’s sagacity becomes clear as he is not easily shunned from knowing of Macbeth’s regicide as “Wisdom plucks [him]/from over-credulous haste”. Furthermore, “over-credulous” may suggest how Malcom does not believe in what he has been told so quickly and entirely which portrays his carefully-thinking nature thus wisdom. Moreover, the use of dramatic irony may cause the audience to draw their own prior knowledge of Scotland’s monarchs, for a Jacobean audience would have been well aware of the battles for kingship and the history of the monarchy thus one might suggest the audience will think of King Malcolm who was known to be a much stronger leader and character than the King Duncan (who was the heir to the throne before Malcolm died). A modern audience may associate the use of dramatic irony to Greek Theatre. The ancient nature of Greek Theatre might evoke a sense of power: Malcolm is honest because he has enough power through the patriarchal nature of Greek theatre to voice his opinion and the dramatic irony is an enabler for the audience to feel more trust for Malcolm, as they may recall the old King Malcolm’s great character strength thus revealing Malcolm’s honest and wise mien.

Malcolm is conveys kingship as being for only those with particular attributes…

You could use the idea of iambic pentameter making him equal.

He ends the play which suggests he can have the most influence onto the audience and control the catharsis they feel during his coronation in Scone, where typically all Kings had been crowned thus suggesting being an aristocrat with great power was his destiny.Both audiences however, will be able to draw on the truths of the novel: Macbeth committing regicide and Malcolm's belief as being identical which amplifies his wise manner. 

Shakespeare uses iambic pentameter to present Malcolm as powerful in the novel. Malcolm's power is reduced through the change of setting, for he flees to England whereas Macbeth stays put in Scotland, establishing his dominance.