Interesting article with some news on upcoming DC TV shows including Krypton and Metropolis. Yes, there is an existing pre-Batman show and two pre-Superman shows in the works.
There Are Too Many DC Comics TV Shows
http://www.ign.com/articles/2018/02/05/there-are-too-many-dc-comics-tv-shows
As much as DC may still be struggling to gain a foothold on the big screen, they've truly become a force to be reckoned with in the TV world. The CW alone is now home to six different DC Comics-based series, and that's not even counting other current series like Gotham and Lucifer on Fox or
Preacher on AMC. And now, with DC prepping a new streaming service that will play host to shows like Titans and Young Justice: Outsiders, there's about to be more DC content on TV than fans can possibly make time for. But is that really such a good thing? We may be reaching the point where having this much DC content does more harm than good.
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This dilemma is really becoming apparent with
the recent announcement of Metropolis, another series exclusive to the DC streaming app. Metropolis is basically the Superman franchise's answer to Gotham, exploring Lois Lane and Lex Luthor's respective struggles in the city before the arrival of Superman. Why DC would even want to replicate the Gotham formula is unclear. Gotham may draw respectable ratings for Fox, but it's also been critically savaged in the past and mocked for its handling of many of Batman's iconic villains. Often, the show seems hellbent on cramming as many Batman elements as possible into a pre-Batman setting, and I fear Metropolis will suffer from that same lack of storytelling discipline. Not to mention that Gotham at least has its young version of Bruce Wayne to fall back on. Presumably, young Clark Kent won't be a part of Metropolis.
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Here's an article about Flash's Killer Frost problem.
http://www.ign.com/articles/2018/02/13/the-flash-how-do-you-solve-a-problem-like-killer-frost
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But on the other hand, Black Lightning took another step up this week. I was originally concerned about how they were treating Tobias Whale, but the last few weeks have been an excellent slow build with some good reveals and teases about his past. Annisa and Jennifer had some great pre-hero scenes. Yet the show manages to keep it's voice. The opening scene with Black Lightning confronting the cops about to shoot a kid was perfect.
A show this fresh and high quality really reveals the wear and tear on Arrow this season. It's hard to watch. The best thing this season was the Deathstroke/Jericho arc, but according to that link, they can't use him since he's going to be in the upcoming Batman movie. The DC embargo has been a problem going all the way back to the "Bat-embargo" that kept high profile Batman villains out of Justice League Unlimited. DC loves to shot themselves in the foot for no reason.