User blog comment:Ironman444/Marvel Team up being continued./@comment-4651179-20130323172620

I don't think this is a "Marvel Team-Up craze", Marvel always have been making comics with guest appearances since the early Silver Age, the Fantastic Four appeared in Spider-Man's very first issue of his own series.

But it's good to actually see two series with team-ups being the main focus, Avenging Spider-Man and A + X.