Let's analyze the phrase carefully.
> A trademark owner is not required to uncover all possible uses that might conflict.
> and it’s developed a demo game called Nreal Tower.
You, personally, might not confuse this with Unreal but do you think that an average person can differentiate between Epic's product and Nreal's product? (I'm pretty sure though that the answer to that is "I don't care, I don't really play computer/video games.")
> or immediately commence a lawsuit against every possible infringer.
Epic knows that Nreal exists back in 2018
> Epic and Nreal have been quietly fighting over the “Unreal” trademark for years. Epic filed to block Nreal’s trademark in 2018, and the companies discussed a settlement after that. But Epic’s suit claims the discussion was “fruitless.”
In other words, it was already known to them that Nreal exists as a company and they have attempted to settle this previously. In other words, this is a continuation of a 2018 lawsuit.