Ghostbusters: Spirits Unleashed - 3 New Ghosts

When it comes to frantically filling the soulless voids, The GLUTTON takes the cake, the table and the chairs everything in close proximity. The glutton consumes, the stronger it grows. The world is GLUTTONS buffet and this desperate, greedy little ghost is always ready for seconds
Unique Ability - Consume
Ultimate Ability - Refuse Rockets
Minion - Minion Swarm
The demonic POSSESSOR is a beast like monster which extreme brute force that can sniff out a scared buster like a slab of rotting meat. The POSSESSOR compensates for its bulky lumbering by living up to its moniker: haunting objects with a ferocious unbridled speed, not to mention, possessing the occasional Ghostbuster or two 
Unique Ability - Malevolent Vortex
Ultimate Ability - Terrorising Possession
Minion - Minion Swarm
It’s safe to assume that before you ever notice a WATCHER, it has certainly already notice you courtesy of its giant external eye attached via a disgusting semi-corporal tendon. WATCHERS are known for sending an occult oculus hurtling towards intended scare targets, and then either recoiling it back to its socket or pulling its torso to the eye itself, phasing through anything that stands between them. So yes, quite hideous all around 
Unique Ability - Lookout
Ultimate Ability - Bug Out
Minion - Minion Swarm