Yeah and only a year or so late. Nice work...
How Fettel comes back is covered up-front in the Fear 2 DLC. There's no co-op bot if you don't have a second player, Fettel will only appear in cutscenes if such is the case. With two players, Fettel has less health than the Point Man, but he can possess enemies, use telekinesis, and find shortcuts (possibly leading to supply caches or supplemental plot) with his psychic powers. If it turns out to work how they're saying it will, it won't be like L4D where cooperation is necessary for progression. Whether or not Point Man and Fettel share resources and how well they cooperate is up to the players; the ending will be ultimately determined by how the players behave towards each either, either one converting to the other's cause or both coming to blows.
The game picks up nine months after Fear 2 just before Alma is set to pop with Beckett's kid. The child will an immensely powerful psychic and Alma's plan is to use it as the anti-christ. Helping or stopping her is one of the choices both players will have to make, possibly in opposition to each other.
Stop doing updates to classes that already have unlocks. I demand the Engy update before anything else can be considered!