booored said:
that is true... this "could" be a difference.. but if this IS the rules.. and I'm going to get my own confirmation.. then it raises all sorts of questions about the damage stack.. something with the game is not meant to have... Like if this took thing is real.. then what happens when you declare a blocker, reveal the shadow card and then player 2 sneak attacks a Son of Arnor for example.
I actually think the Wandering Took ruling informs other similar situations, including the one you presented. It seems that, once an attack begins and a defender is declared, the participants (enemy and ally) are "locked in" unless one or the other leaves play. Wandering Took will still be the defender if it changes control midway through an attack. So--and here I extrapolate a little, though hopefully within reason--removing a character or enemy from play can change the execution of an initiated attack, but simply moving them around on the table will not.
So, in the Son of Arnor example, the attack has already been initiated by the time Sneak Attack is played. Based on the Took ruling, I'm inclined to say that the attack would simply continue against the original defender. Even though the enemy is the one moving around in this instance, both participants in the attack are still on the board. I don't see any reason why engaging the enemy with SoA would break off the attack.