In the Deep Dive panel they showed some Covenant abilities that turned you into some creatures, or summoned creatures for different classes. I could entirely see these as hunter tames.
New moth, fox, and deer from Ardenweald. The Fox is a slightly recolored/unarmored version of the Vulpine Familiar.
Shade Hound, a bear-hound-armor-thing.
Rabbit bug things from Ardenweald.
Recolored spider mounts from Maldraxxus.
More colors of the moths.
The Features Overview Video also shows bats, unicorns, manasaber-like beings, and other creatures that look undead.