The writer must have seen it working in Deadpool and decided to copy the plot device. Again - where are the senior editors? Don't they keep track of this sort of thing?
DC and Marvel editors haven't really edited for years. At this point they're basically talent scouts who do little more then beg big names to take over the books and do what they can to try and make sure that the endless crossovers sync up. And they're not even that good at it
