What if instead of the Gum Gum Fruit Luffy ate the Maou Maou Fruit: Lucifer Edition
The Maou Maou Fruit contains one Paramecia, Zoan and Logia power which vary depending on the edition.
Maou Maou Fruit: Lucifer Edition
Paramecia: Chakra (from Naruto).
Zoan: Dracopyre - In full body they're immune to the affects of the sea, if/when a Lucifer drinks the blood of a living human or animal, the Lucifer gains that beings memories, life energy and any powers/abilities they possess (except for other Maou), teeth and claws that can slice though diamond.
Logia: Wind
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Maou Maou Fruit: Leviathan Edition
Paramecia: Invisibility
Zoan: Vampire - Full body mode is a swarm of bats, if/when a Leviathan drinks the blood of a living human or animal, the Leviathan gains that beings memories, life energy and any powers/abilities they possess (except for other Maou).
Logia: Sea
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Maou Maou Fruit: Asmodeus Edition
Paramecia: Drain (absorbs all out side liquid).
Zoan: Dragon - In full body they're immune to the affects of the sea, skin is hard as diamond.
Logia: Earth
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Maou Maou Fruit: Beelzebub Edition
Paramecia: Magnet.
Zoan: Werewolf - In full body all abilities are tripled (their isn't any difference between hybrid and full body), teeth and claws that can slice though diamond.
Logia: Fire