Spawn comics often contain darker and more adult-oriented content. They're not typically appropriate for younger audiences. Older teens and adults might be better suited to handle the themes and imagery.
I think 'Spawn Samurai Wars Story' is likely to be a fictional account set in the era of samurai. It could center around a particular samurai or a group of them. There would be epic battles, of course. The story might also explore the relationships between the samurai and their lords, as well as their relationships with commoners. There could be themes of sacrifice, heroism, and the struggle for justice in a feudal society filled with power struggles and rivalries.
It depends. In some cases, especially for indie or small-press comics, newsprint variants might exist. But for major mainstream comics, it's less common. Publishers often choose different paper types based on cost, target audience, and distribution strategy.
I think 'Harry Potter Hell Spawn Fanfiction' might be centered around a very particular subset of fan - created stories. It could be that some fans are exploring the darker aspects of the Harry Potter world, like what would happen if Voldemort had managed to create some sort of unholy abomination. It could also be about exploring the afterlife in the Harry Potter universe in a very dark and untraditional way, perhaps with 'hell spawn' - like entities emerging from the depths of some dark magical realm.
Comic variants are a marketing strategy. They give fans more options and make the comic collecting experience more diverse. Sometimes they have unique features like foil covers or variant storylines within the same basic plot framework.
It depends. Some comic book variants can be highly valuable, especially if they are rare or have special features. But not all variants are worth a lot.