Deadpool is well-known for having the ability of "fourth-wall awareness" in the comics, where he is aware he is in a comic book, and would frequently make comments about it. He displays this ability in the feature, when he tells his teammates to "strike a pose" for the viewer.
A scene in "Hulk Vs Wolverine" features a hall of tubes with floating babies. One of the tubes reads "X-23". X-23 was a clone of Wolverine, the 23rd attempt at cloning Wolverine and the first successful attempt. The character was created by the writers Craig Kyle and Christopher L. Yost, who worked on X-Men: Evolution (2000) as well as on this feature.