With Halloween less than a week away, it’s time to pack in the final Spooky Season watches before welcoming Holiday Movie Season. Aside from rewatching old favorites and classics, streaming services have released a wealth of original horror content, from movies to series. Here’s a selection of some of the best new horror offerings to binge through the end of October (and beyond, because remember, it’s always Spooky Season if you really want it to be). First up, the surprise horror sensation of the fall, “Barbarian,” arrived on HBO Max Tuesday. If you have managed to avoid spoilers for this tru…