Fortnite Ninja Master is the description of the newest target according to a reality log released Jan. 29. The reality log hints that at least one member of G.I. Joe will be joining the Fortnite ranks.
Fortnite Ninja Master: G.I. Joe Crossover is Coming Soon
There are a few context clues from this log that suggest G.I. Joe as the next crossover. First, the log mentions that this target is part of a group. We also learn that every member of this group has a codename of some sort. The last line of the log is also the most convincing piece of evidence. The log ends with the line, "And knowing is half the battle!" This of course was the iconic line that ended every G.I. Joe show. This log was also released after the Epic Games CEO Donald Mustard tweeted out a photo of himself looking at a comic book. More on that story here.
There's still room to speculate who of the G.I. Joe cast would join the world of Fortnite. However, Snake Eyes seems to be the most likely candidate. Snake Eyes is one of the most iconic members of G.I. Joe because of his ninja outfit. This would also match up with the target description of "Ninja Master."