So I'm really surprised no one has made this crossover yet. I'd write it but I've only watched some episodes of The Walking Dead and I don't feel like I'd get the characters right at all.
So the challenge is this, write a crossover between Hellsing and The Walking Dead. Whether it's a one-shot or full fic, doesn't matter. I mean think about it, Ghouls are the same as Walkers pretty much, except they're created through different means. Ghouls are probably even more dangerous since they can be armed and controlled by vampires.
The plot of the crossover needs to be a character from Hellsing ending up encountering the Walking Dead crew. You can have the two worlds as separate dimensions or merge the worlds (Both series take place in the same world and a Hellsing character ends up in America somehow)
The options for characters would be: Alucard, Seras, Walter, Pip and/or Integra. It can be one or any combination of them.
Think about how badass it would be to have one of these guys just destroy every single walker they come across, no competition. A one-shot I can think of is that Alucard is being sent around the world by Integra, cleansing it of all the undead, and he comes across Rick and Co. and pretty much saves them and all of America by being so incredibly badass.
OR, you could have a full length fic where a vampire is actually the root of the walker disease and Hellsing is investigating.
Whatever you come up with, I hope someone writes this fic, and if you do, review this challenge to let me know so I can read it!
AND NO ROMANCE!