From Man of Steel’s Zack Snyder to Guardians of the Galaxy’s James Gunn to Doctor Strange’s Scott Derrickson, and even the recent hiring of David Sandberg for the Shazam solo movie, it has become increasingly common for studios to tap horror directors to step up to the plate for major superhero films.
For WB to potentially hire Jaume Collet-Serra for Suicide Squad 2 makes lots of sense.
Whether or not he will sign on to the project remains to be seen, but his resume and history as a filmmaker certainly make him a suitable choice for the project.
He has ample experience directing bizarre movies with dark tones, and the very nature of the thriller/horror genre requires him to be able to work with an inherently smaller budget.