Hand of Gork and Fanatics

This is the FAQ anechrome refers to:

O&G Official Update Version 1.2, p.2:
Q: Can a unit of Night Goblins that are concealing Fanatics be placed any closer than 8" to an enemy using the Hand of Gork spell?
(p53/72)
A: Yes, though you must follow all the normal rules for stopping to release the Fanatics from 8" away before you finish your move.

This clarifies the rule on O&G Army Book, p.53:
"Fanatics must be released when a concealing unit comes to within 8" of the enemy or vice versa. The moving unit stops immediately (fliers land). Once the Fanatic's movement has been resolved, the unit can continue moving, if the controlling player wishes, although chargers must complete their charge, unless panicked."

Hence, it also applies vice versa. Basically, the FAQ indicates that you treat a unit moved by the Hand of Gork as a flier:

- The unit stops and lands, if and when it comes within 8" of the concealing unit
- The movement of the Fanatics is resolved
- The unit continues its movement

Yes, the intent is clearly that flying units can be hit. The answer to your question is not covered in the rules as such. If the flying unit cannot land on the spot, there are really only two options: you stop 1" either before or after the obstacle.

The first is based on the fact that normally units would stop 1" before an obstacle; the second on the precedent of fleeing units and magical vortices. I would prefer the second option, because in the first case, the unit normally cannot move any further, while in the second option the movement can continue, just like in the present case. It is also a bit more logical, because you will have passed the point where you have triggered the Fanatics.

BRB p. 25: "If the flee move would result in the fleeing unit ending up 'on top' of or within 1" of another unit or impassable terrain, then it carries on fleeing straight forward until it is past the obstruction, and will then halt."

Just replace "flee" by "fly" here.

Apparently, the picture did not upload. 

- In both options,  the Fanatics have already been triggered. Placing the flying unit before the obstacle is merely to deal with that practical problem, and does not somehow "untrigger" the Fanatics. However, as I said above, placing them after the obstacle seems a bit more logical, because you will have passed the point where you have triggered the Fanatics.

- The Night Goblins must release the Fanatics - there is no way around that. The fact that the Fanatics might not have the desired effect is no argument. 

I do not exactly know what situation you have in mind, but, while the Fanatics are triggered, there is no need for them to be destroyed, in any case.  

O&G AB p. 53: "you may choose the direction in which it travels, and the point on the concealing unit from which it starts."

You can try to position them in such a way that they can attack in your turn. 

As I was trying to indicate in my previous post, there is a better option. Nothing in the rules actually compels the Fanatics to try and reach the enemy unit that triggered the release. The fact that flying units must land just gives you the possibility to attack them.
To repeat O&G AB p. 53: "When a Fanatic is released, you may choose the direction in which it travels, and the point on the concealing unit from which it starts."

South east, along the impassable terrain, straight south in the direction of the starting position of the flyer, and/or a bit more south south west, in the direction of the enemy unit next to that. You would need to be extremely unlucky for one of your units to be hit by a Fanatic, next turn. The Fanatics may not harm the enemy either, but they may still deny terrain to him, or threaten his flank. And you will no lose their VP yet. Of course, if you are not prepared to take such a risk, then, perhaps, you should not take Fanatics?