If we're gonna go that route, let's go for the big guns. Get the Macleods and all of their Immortal friends, and definitely Blade should have a piece of the action.Also it’s shame Buffy didit know about charmed ones as Piper/Phoebe/Paige could help and Giles could step in time mince and gotton Hercules and Xena to help. !.
Let’s not forgot Harry Potter and all there wizards.
I always thought they kind of retconned what the hellmouth was. Maybe I'm wrong, but I always thought it was meant to be the weak point between different dimensions that gives off energy hence why vampires and demons flock to it but also why there was that tentacle thing trying to come out of it. It gives off bad vibes hence why so many churches in Sunnydale because it makes people "pray harder". Also in Season 2, Spike said about the hellmouth energy helping to restore Dru. Glory's plan to use the key would've also caused a similar effect where other dimensions bleed into reality and things come out of the portal eg the dragon.Also, I'm tired of making excuses for Season 7, it wasn't that well planned out.