>>10765496>Looks like it's from something called Big Bang Comics #10.Yep that's it, it's written by the same guy who did the Mirage era stuff(which wasn't canon, but this skirts by as happening before the Image stuff so it never was officially de-canonized).
>>10765476The Batman and Robin is a bit more blatant when they encounter him a few years later in the Image series and he takes up the Knight Watchmen mantle.
Basically the whole thing with Big Bang is that they're straight homages/expies to DC and Marvel comics. Basically a way to do their own take on the characters.