Warning: contains major spoilers for Batman/Fortnite: Zero Point #5!
Deathstroke has never been thought of as being one of DC's greatest detectives, but he just proved that he is. Batman/Fortnite: Zero Point #5 features the assassin in the world of Fortnite. While he may not seem like a detective to begin with, he has one particular trick up his sleeve that could make him more effective than Batman himself.
In the limited series Event Leviathan, Deathstroke was included on a secondary team of detectives. The objective of the two assembled teams was to uncover the identity and motivation behind the mysterious figure Leviathan. The first team was naturally composed of Batman, Damian Wayne, Lois Lane, the Question (Vic Sage), and Green Arrow, as well as Plastic Man and a Manhunter. The second team - assembled secretly by Lois - included Zatanna, Constantine, Detective Harvey Bullock, Elongated Man, Renee Montoya as the Question, and Deathstroke. While most members of these teams make sense, Deathstroke seemed like an outlier. Now, he's proving that he deserved to be on that team for the exact reason that Lois assembled it to begin with.
Created by the team of Donald Mustard, Christos Gage, Reilly Brown, Nelson Faro DeCastro, and John Kalisz, Batman/Fortnite: Zero Point #5 places Deathstroke in the middle of a new mystery. He's working with Batman, Catwoman, and several original Fortnite characters to uncover the secrets of the game's world - including how to get home. Along the way he makes some excellent deductions, bringing up suggestions that could be plausible in this world - and even back in the DC Omniverse - though they aren't the kinds of conclusions Batman would be okay with drawing himself.
While fighting against a group of unidentified guards, the Dark Knight asks an interesting question: how are the guards so in synch? After all, some of them just arrived, which eliminates the possibility that they've worked together in Fortnite's world for many years. This would have been the most reasonable solution, but it isn't the reality. The truth of it really isn't even known - but Deathstroke readily has three potential explanations. The guard could be a clone, a "parallel-universe duplicate", or these could be people from the same world that look identical. Although these would be far-fetched in real life, in the world of comics, stranger things have happened. Superheroes have ended up in video game worlds with lost memories, after all. Naturally, all of these are a front for Deathstroke to cover for himself since he has a bigger role in the background dealings of the world. However, these are still possible solutions that Batman wouldn't really consider.
The Caped Crusader, though he has a superior intellect, is a stickler for the pragmatic. He typically wants answers that make sense, that have a rhyme or reason to them. He usually has answers grounded in logic and science. Magic and the supernatural aren't really his department. That is exactly why Lois Lane called a second team in back during Event Leviathan. Zatanna and Constantine always deal with magic and the supernatural. Constantine and Zatanna's scope of operation relies on the presence of those things, therefore they are more aware of their influence on the world. Deathstroke - despite simply being a really good assassin - is also more willing to accept these aspects of his world. As a result, he can accept strange possibilities, in ways that hinder Batman. His world's the same as Deathstroke's, but he hasn't accepted the strangeness of it - the fantasy and sci-fi elements present within it. Batman wastes time on being pragmatic, whereas the deadly assassin sees greater potential. This makes Deathstroke one of DC's greatest and most underrated detectives.