Update: 4/29:

The fifth and final teaser has been revealed, and it turns out that Marvel has been teasing a new storyline in the ongoing Uncanny Inhumans comic.

We still don't know who, what or where Mosiac is, but this mystery is connected to the Inhumans and their role in the Civil War II conflict. Uncanny Inhumans #11 will kick off a Civil War II tie-in storyline, with Marvel's solicitation for the issue teasing, "After what Iron Man did in CIVIL WAR II #2, Medusa must act." Check out Marvel's full list of solicitations for June 2016 to learn more about the books tying into Civil War II.We debuted the fourth teaser in this series , which asks "Where is Mosaic?"The third puzzle piece teaser again asks "Who is Mosaic?", but this time Iron Man's helmet can be glimpsed alongside several other mystery characters:The presence of iron Man would suggest that this is a general Avengers story rather than being Spider-Man-centric, though we're not ready to give up on the Jessica Jones theory just yet. CBR debuted the next piece of the puzzle today, which shows Spider-Man and several mystery characters shrouded in shadow. This time, the question has shifted from "Who is Mosaic?" to "What is Mosiac?".Does this mean Mosaic is a Spider-Man-centric story? We doubt it, given that Marvel has also recently been teasing the "Dead No More" storyline in Amazing Spider-Man . But clearly the wallcrawler is playing a role in this conflict.The original story is below:

Marvel Comics began a new series of teaser images today built around a puzzle piece theme. Each of these teasers (drawn by artist Stuart Immonen) will reveal a new piece of the puzzle and shed light on a major upcoming storyline.Check out the first teaser below, which asks the question "Who is Mosaic?".It's hard to tell from this image which characters or series might be involved in this teaser. Immonen's abstract, painterly style here reminds us a bit of David Mack's covers for Alias. Could this be promoting the new Jessica Jones comic that writer Brian Michael Bendis teased at Emerald City Comic Con? Or maybe another new series spinning out of the events of Civil War II?We were able to confirm with Marvel that these new promos aren't connected to the recent "A Long Awaited Return" teaser . Keep checking back, as we'll update this article whenever Marvel reveals more pieces of this mysterious puzzle.

Jesse is a mild-mannered writer for IGN. Allow him to lend a machete to your intellectual thicket by following @jschedeen on Twitter , or Kicksplode on MyIGN