Well, it's something to think about at any rate. I mean, sure we already HAVE a Comet, but that one's a ferret.... definitely NOT the super-horse and, if there can be more than one hero going by the "Green Lantern" identity, then there can definitely be two Comets. :-D
Sorry, I forgot about the other Comet (Wow, there are a lot of fan characters to keep track of now!), but at least I don't think there would be much chance of the two being mistaken for one another.
I might give it some thought.