There are not so many figures in each of these factions, so I will run through what I have prepped and undercoated so far for each of the three armies; Fomorians, Ushabti, Wolfen.
As mentioned previously these will appear as allies to the other LotR factions when used in my own universe battles. I like the idea of some strangeness appearing on the tabletop upon occasion to spice things up a bit.
29 Fomorian warriors
14 Wolfen warriors
It would be nice to spring these forces onto an unsuspecting opponent and see their reaction. Without knowing points values and so on, the opponent would be likely very wary of attacking these warriors and monsters, which to me seems so much more realistic than the opponent seeing them and saying: "Oh yeah, they are worth twenty points, my three warriors can take one of those down easily".
I like the idea of the unknown on the tabletop - it makes for a more fun game. Obviously I would not set a very unbalanced/overpowered force against an opponent as that would not be fair; just inject an element of doubt and surprise.