In the DC Universe, gods and demons generally do not directly appear in the World, mainly for the following reasons:
Rule Restrictions
In the movie "Constantine," God and Satan agreed to make the World a neutral zone, where neither side could directly interfere with human actions, and could only send "proxies" to secretly influence humans.
Balance of Power
The power of gods and demons is too immense; their casual appearance in the World could disrupt the balance of power in the real World, leading to chaos and disaster. Therefore, they are restricted to their respective dimensions or realms.
Lack of Faith
In the DC Universe, although various deities exist, humanity's faith in them is neither unified nor strong. This limits the influence of gods and demons in the World, as they lack sufficient faith power to sustain their prolonged manifestation in the World.
Dimensional Differences
Gods and demons typically reside in different dimensions or realms, with dimensional barriers separating them from the World. Crossing these barriers requires immense energy or specific conditions, which limits their frequency of appearance in the World.
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In the DC Universe, the Old Gods and New Gods mainly differ in the following ways:
Source of Power
Old Gods: The power of the Old Gods is often related to natural elements and the power of faith.
For example, Poseidon, the God of the Sea, controls the ocean, and his power comes from ancient humanity's reverence and faith in the power of the ocean.
They are also restricted by the rules of their own mythological systems, such as the Greek Gods being bound by the threads of fate woven by the Three Fates.
New Gods: The power of the New Gods is more based on high technology, cosmic energy, and their inherent racial talents.
For instance, the Gods of New Genesis possess advanced technological equipment, and Darkseid of Apokolips can utilize the anti-life equation to control life. This form of power transcends the scope of traditional natural elements and faith.
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Conditions for becoming Shazam:
Purity of Heart: One must be able to resist the temptation of the Seven Deadly Sins. For example, Sivana was deemed impure by the Old Wizard and eliminated due to being tempted by the Eye of the Demon. This Billy should not meet the requirement.
Courage: When facing danger and difficulties, one must have the courage to step forward. For example, after his family was kidnapped, Billy bravely fought the villain, demonstrating the required courage.
Good Qualities: One must have a kind heart and be willing to use power to help others and protect the World, rather than abusing power for personal gain.
Spirit of Sharing: One must not monopolize power, but be willing to share it with others to jointly protect the World. For example, after gaining power, Billy and his companions formed the "Shazam Team" to fight evil together.
According to the comic setting, Captain Marvel actually doesn't meet the requirements either, but after he told the Old Wizard, "You're looking for someone who doesn't exist," the Old Wizard felt he was wrong and then gave him the power.
Ridiculous, all thanks to the protagonist's halo.
Shazam 1 and Black Adam, the two stories have some discrepancies. According to Black Adam's story,
Then, inferring back five thousand years, Hulu, the first to gain Shazam Power and be recognized by all the Wizards, must have met the requirements.
This is a retcon.
Holy Spirit
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In DC's setting, Black Adam is conscious while in seal.
From the plot of the comic "Justice Society of America," the Wizard Shazam trapped Black Adam's soul and power in a scarab and buried it in a tomb. During the seal, Black Adam could perceive the passage of time and some external events, such as his descendant Theo discovering the scarab.
In the movie "Black Adam," although it's not explicitly stated what his specific conscious activities were during the seal, from his ability to quickly react to his surroundings and enemies after being unsealed for nearly five thousand years, it can be inferred that he likely maintained some level of consciousness during the seal, being aware of his own power and sealed state, thus enabling him to act immediately upon release.