With players adventuring the lands of Vilderan in Torchlight 2, they'll encounter a much bigger variety of creatures compared to what was seen in Torchlight's underground crypts. Runic Games has provided a few portraits of Torchlight 2's monsters that you ought to "learn to fear" this instant.
What will you run into during your travels? There's tall Yakotaurs who ram into enemies with their horns, mythical Manticores that fly and run around, and stonelike Gargoyles who patiently wait for prey from high places. Not every enemy is a living being as you'll have to deal with reanimated corpses and ironclad Dwarven Automata to take down. Most fearsome of all are Spectral Dragons that feed on magic and Ember to strengthen themselves.
The portraits of these monsters may hint at Torchlight 2's environments: bogs, deserts, ruins, dwarven mineshafts, and mountain ranges could be some of the places that must be travelled through. Runic Games is promising more Torchlight 2 details up until E3 so keep checking back for new info.