Regarding Anthony.

The King has been thinking a lot lately. He has observed his heirs, Timothy and Dorian, but he can't be fully satisfied with them for one reason: together they make a perfect King, but there can't be two kings.
To his eyes, Dorian is too cruel, merciless, angry, violent and reckless to be a King. He sees him much more fitting to be a military leader. In fact, he is considering very seriously to promote him as General of the Hunters. He is the one who would earn their respect, someone they would fear and respect completely. Someone who will bring the Hunters to an even higher level.
Timothy, on the other hand, is too much of the opposite, instead. Too kind, merciful, sweet, non-violent. He would highly risk to not earn the respect of the citizen and be overthrown in no time.
He needs someone to be half-way between them. Someone who can be cruel when needed but merciful too. Someone not-so blood thirsty but neither a piece of sugar.
He highly respects and appreciates both Timothy and Dorian, but he also realizes that neither of the two would probably wish to be King as there are many other things they would feel more comfortable with and would be more fitting for.
And when he thinks about it, he can't help but realize that Anthony is sort of the "perfect" mix between Dorian and Timothy.
He knows that Anthony can be almost as violent and merciless as Dorian, but he does not have his same amount of anger and hate within. Anthony values family extremely highly, is "obsessed" with respect and honor, he is stubborn, prideful but also fair and rightful. (Unless given reason not to.).
What he never appreciated about him, was the fact he "wasted" himself on Earth like that. One of the strongest Auriold, one of the highest ranked Princes of Nortrig, wasting his skills and time as some lesser criminal there, instead of fighting for his Realm. Though, the fact Anthony returned several times already, brought the matter to his mind again and this time he intends to investigate to know once and for all, if Anthony would actually be fitting to be his heir.
He himself decides to go pay a visit to Earth. For barely 1 hour. He, one Elite Guard and Artemis. He wants to meet Don Giulio and understand what could he ever offer to Anthony to convince him to fall that low instead of "rising in greatness" in Nortrig.
He has a brief yet very polite conversation with the old man, who at first feared they were to tell him Anthony had died. Without him to even notice, Morgan reads his mind concerning Anthony and learns of everything. The reasons why he followed the old man and worked for him. Don Giulio needed him and Sonny needed to be avenged, even Morgan can't disagree on that.
In the end the two separate, where Don Giulio begs Morgan to promise him he will not let Anthony make his same mistakes. He doesn't want him to ruin his life like he did. The old man realized that his way of living only brought to the death of those who mattered the most to him and left him now, old, useless and alone. He wants Anthony to achieve his goals, make his dreams true. Just like a father would, because he truly loves him as if he was a son of his. And of course, Morgan promise that to the old man.
Upon leaving, he orders his Elite Guard to stay and protect the old man from his enemies, for the time it is left for him to live.
This will prevent Don Giulio from being killed. This will prevent Anthony from replacing him to avenge his death. This will change the world, for Anthony.

Knowing the truth definitely convinced Morgan that Anthony is currently his most fitting heir. His heart is something which impressed him in a good way. His decision is made. Should anything happen to him, Anthony will succeed him. (Unless Benjamin returned, that is.)
And that's what he needed to communicate to Anthony when he summoned him at the palace.
He is convinced his grandson can make a worthy King. able to earn the respect and love of his subjects.