It could be really cool. Picture the powerful beings from Overlord in the world of Ben 10. Maybe Ainz Ooal Gown could use his magic against some of Ben's alien forms. The different power systems would create some interesting battles and interactions. For example, how would Ainz deal with an opponent like Four Arms? And how would Ben react to the undead hordes that Ainz commands? There are so many possibilities for epic crossovers in this fanfiction concept.
It's hard to say. Ainz Ooal Gown has a vast array of powerful magic spells at his disposal. However, Ben when he transforms into Alien X could be extremely powerful as well. Alien X has reality - warping abilities. But Ainz has his intelligence and strategic thinking. So it could really go either way depending on the situation.
One idea could be an Overlord crossover with Sword Art Online. You could have the powerful beings from Overlord enter the virtual world of SAO and cause chaos among the players. They might see the game world as a new territory to conquer or just a place for some interesting 'experiments'.
I didn't know that Overlord Lover was the name of a novel, nor did I know if there was an animation. If you can provide more information or context, I will try my best to answer your questions.
To start an Overlord crossover fanfiction, focus on a central theme. For instance, if it's a crossover with Fullmetal Alchemist, the theme could be about the search for truth in both worlds. Decide how the worlds will merge or interact. In this case, the alchemy in FMA and the magic in Overlord could have some sort of connection. Write down character profiles for the main characters from both universes. This will help you write their dialogues and actions more accurately as you start writing the actual fanfiction.
Well, a cool plot could be a fusion of the two power systems. Imagine if ninjas in the Naruto world could learn some of the magic from Overlord. It would completely change the balance of power. Or perhaps the Akatsuki organization teams up with some of the villains in Overlord to take over both worlds. They could combine their resources and knowledge to create a really powerful and evil force. Also, there could be a story where a character from Naruto, like Sasuke, tries to master the power of the Overlord world to become even stronger and seek revenge in a new way.
It's likely that Ben with the Omnitrix would be one of the most powerful. He has access to a wide variety of alien forms, each with their own unique abilities. For example, Heatblast could deal with cold - based threats in the Rosario Vampire world, and XLR8 could outrun any fast - moving vampires or enemies. However, some of the powerful vampires like Alucard in Rosario Vampire also have incredible strength, speed, and magical abilities. So it could be a close call between Ben in his most powerful alien forms and the top - tier vampires.
Well, it could be about Ben using his alien forms to fight alongside the Mass Effect characters against a common enemy like the Reapers. Maybe his Four Arms form could be used for brute strength in hand - to - hand combat with the husks.
One possible plot could be that the Omnitrix somehow gets linked to the Green Lantern power source. Ben could end up with a new set of alien forms that are influenced by Green Lantern energy. For example, he might have an alien form that can create constructs like a Green Lantern but with its own unique alien twist.
One possible plot could be that the Omnitrix malfunctions and sends Ben 10 to the Justice League's universe. The Justice League initially views Ben as a threat due to his alien forms. But as they learn more about him and the threat of an inter - dimensional villain, they team up. Ben's different alien forms offer unique skills that complement the League's powers, and together they fight the villain to save both universes.