Correct about Tom.
There are one or two objective allies who have shadow effects written on their cards, so those would get resolved when they pop up as a shadow.
On a side note: thread necromancy! man. There's nothing quite like pulling up the forums, seeing a thread with 2 pages that says "Tom Bombabil confirmed!" and thinking "did I miss something ??" ... expecting to see a post about a new Tom player card, and then being disappointed because the thread is actually going on a year old and about an encounter card that I already know about.