"Invocation" by Dylan Horrocks and Richard Case.
Tim Hunter gets a second solo title, moving from Books of Magic to Names of Magic.
He gets involved in a fight with some warriors from another dimension, when all of a sudden one of the Trenchcoat Brigade, Dr. Occult, steps in to help him. Later, the other members also arrive:
The Stranger leads Tim and the rest to a possible future, where Tim gets to see an older version of himself. Of course, Tim wants to know more, but the Stranger is vague (also of course!).