Why I think this would be an awesome crossover teamup:
- They both look a bit demonic.
- They both have pointed ears.
- They both look cool in shadow.
- They both have glowing eyes with no pupils.
- They both have tails.
- Both of their fathers are higher demonic figures.
- Both of their mothers are human(witch and mutant).
- They are both Catholic.
- They both fight for the good of mankind.
- They are both loyal friends.
- Whereas Hellboy is big, strong and gruff, Nightcawler is slim, agile and lighthearted.
- Nightcrawler is a swordsman and Hellboy prefers his gun.
So what do you guys think?