OPENING COMMENTS: Darkhawk vs Vector
Y'know, it's funny. Vector's real name is Simon Utrecht. I study in Utrecht (it's a city in the Netherlands). I know you all would've died without me noticing this little coincedink. However, I won't bore you with more, and just tell you all why Darkhawk should kick Vector's little "trying to rip off the Fantastic Four"-ass.
Let's get the first bit of the battle out of the way: Prep-time. Darkhawk has got the Avengers files, Vector's got his own resources. Considering he's a pretty powerful industrialist (or used to be anyway) he'll have resources enough to figure out the basics on Darkhawk, but his opponent has the advantage. Darkhawk has access to highly detailed files on what Vector can do, and Vector can't say the same about Darkhawk.
On to their powers:
Now, Tag (from the New X-Men) showed how dangerous a "repelling power" can be, but Vector's don't work in quite the same manner. Tag had the ability to instinctively make people repel, but with just the ability of attracting and repelling matter though, it's not quite the same. It's a potent power sure, but without the aid of his teammates, it's practically useless. To attract Darkhawk towards him would only serve to quicken his defeat, and it's only a matter of time before Darkhawk is capable of surprising Vector and getting around his power, or simply push through by sheer force of will.
Vector offers no other offensive manouvre that can help defeat Darkhawk. He could try and use Ego to his advantage, but that would only serve to anger Ego and that would surely do him no good. All he can do is wait for his inevitable defeat as Darkhawk either tires him out, just plain kicks his ass or uses the location to his advantage. We must also not forget that Darkhawk can heal all of his injuries by just switching between forms, a pretty quick transformation.
Vector's outmatched here.
WINNER=DARKHAWK