As with any late-stage Marvel Studios production, “Deadpool & Wolverine” arrives with some accompanying homework. These movies aren’t merely standalone adventures, they are plugged into a larger framework of interconnected movies, television shows, sequels and spin-offs.

This is truer now than before, since Disney completed its absorption of 21st Century’s assets in 2019. That means that the Marvel Cinematic Universe, which was previously off-limits to both Deadpool (Ryan Reynolds again) and Wolverine, is fair game and that they have access to virtually every Marvel character.

But what should you actually watch before you see Deadpool and Wolverine team-up for their cross-universe romp? We can help, but this probably constitutes a light spoiler warning. As you can probably imagine, there are a ton of fun cameos from other parts of the MCU (and beyond). We won’t spoil those, but we will allude to more concrete callbacks that will greatly...