Have to say I'm a bit surprised about not knowing this was set in the Flash Gordon world of Arboria. The solicits made that clear (and have for months) as well as all the interviews/articles online that talked about the book (again for several months now). From everything that's been said about these particular books, it's clear they're sequels to the recent King's Watch mini, and in fact the creative team made it clear in an interview I read that this was a departure from the news strip version of Jungle Jim.
I personally didn't pick it up because I wasn't interested and couldn't really afford it. But I knew what it was about.