All I look for in a sequel (or a series) is consequences. That things from the first story, be they plot elements, character aspectws and relationships, or world-building, have effects in the second story. And beyond.
Maybe no fictional world did this better than the TV show Babylon 5. J. Michael Straczynski planted clues in season 1 that did not bear fruit until season 3, or 4, or even 5. And there were consequences to actions: relationships changed, plot elements flowed beautifully. Things that happened, the ways people behaved, just "made sense."
Which brings me to the frustrating run of Wonder Woman I recently read, the Odyssey storyline that ran in issues 600-614. This was a re-boot, or re-imaging, or re-something of the Wonder Woman character, started in 2010, that was going to launch the character with a new and modern take, to really establish her as one of their big guns, a pillar of the DC Universe. They even gave her a new look, with long pants, that I kind of liked.
There is no sense in modern comics that what happens in any one issue will have consequences in the next one.