Aren't repulsion and fascinate tied to iron will? Champs with iron will never get affected by fascinate, not sure about repulsion.
Repulse is a relocate effect. Iron Will gives immunity to relocate effects, Unstoppable gives immunity to knockback effects.
Perhaps iron will needs to have its text updated to include relocation effects if it already does that.
Well actually it seems to state in the ability description whether or not it will affect champs with IW. It might be that it doesn't grant immunity to all relocation effects.
There are 3 ways champions can move: Knockback Relocation Movement Knockback is prevented by Unstoppable. Relocation is prevented by Immobile, Earthbound and Planarbound. Movement is prevented by Immobile and Stationary. Abilities will state if they are Knockback or Relocation. The rest is just "move" - Normal Movement, Blizzard, Wandering, Fascinate, Repulsion all fall under this category. Most of these aren't preventable except by Immobile/Stationary, including Fascinate and Repulsion. In addition to the above, Fascinate and Repulsion were ALSO given a special extra counter via Iron Will.
