I mean, I could point out that to set this up, they had to somehow either personally be nearby or get their equipment nearby, otherwise they're apparently capable of sucking individuals into a pocket dimension from pretty much anywhere in the city at will. They had to have been personally present, really, to speak and interact with Relentless to give her the sword, at least for a few minutes. It could also be indicated that, at least so far as I recall, the dragon was remarkably "organic" or non-technological in nature, which is well outside of Leet's normal bailiwick. Alternatively, you could try to float the idea that it's all somehow a simulation or tangible illusion, but at that point you're seriously reaching for plausibility.
And it's not like they could have prepared the ground ahead of time, since this had to have been set-up on with hours at best of preparation, given that Relentless does not (that we know of) have any set pattern of behavior that could be used to anticipate her location well ahead of time.
But the important thing is, if you're deliberately invoking tropes, it builds a certain expectation in your readers. Dashing those expectations, intentionally or otherwise, is not necessarily productive. Not necessarily wrong or bad either, but the reactions you get may not be what you want.
Case in point here, I think.
Personally speaking, I'm not really sure what the Leet and Uber encounter really added to the plot. It seems, in large part, there just for the action scene. There's no clear character development. No confrontation or interactions. It does not seem to contribute anything but to establish a set of "bad-ass credentials", for the most part.
Sure, you can see where there are potential hooks out of it. The duo's paymaster, the tinker-sword, or maybe public reactions to what Relentless is capable of. But none of those really require the scene as it plays out, and could easily have been fulfilled by alternate, less extravagant or drawn-out means.
