Author does what I call a pro gamer move for creating mystery. i.e remove 90% of the material of the story in order to create cryptic mystery.
jokes aside, that's not mystery. Forcefully withholding things from the reader is not mystery, it may sound similar to being curious of the unknown of what's happening or to come but it's not mystery.
The writing is a mess, and the mc spends most of his time being unconscious. The premise sounds exciting tbh, the start also was very good. But author needs to work on the plot and how it develops. Many of the chapters feel like they are missing 2-3 chapters in between.
e.g - taskforce x gets attacked by Harley n friends, the chapters ends, no conclusion to the fight. the next time they appear they are all together fighting against mc in the league of assassin compound, then comes to justice league too.
so there's like a chaos of fighting between the taskforce, also vs mc, also vs batman, also Batman vs mc, also justice league vs mc. yeah sounds so chaotic right.
i wouldn't recommend this fic unless u have too much time.