Mehhh I love the raid idea. I think you're really on to something with that. There's nothing I'd rather do than kill a gigantic space dragon with my buds. The newly-themed armor and weapons would be really awesome as well. As for the subclasses, though, I feel like that's where it gets kind of pointless and impractical. For example, the hunter's shadow shot ability is exactly the same as golden gun with keyhole, except it just does void damage. And the warlock ability is too similar to the titans' fist of havoc. And some of the grenades should be themed more closely to the idea of "dragon hunting". For example, some of the grenades you mentioned are simple blast radius, damage grenades, rather than ones that would [i]actually[/i] be useful for strategically hunting a particular being. Something like a tripwire, an electric net, or along those lines. I'm not the against the idea of new subclasses themed to this theoretical DLC, but I just think that any such additions would have to be thought over a lot more. All in all though, great idea!