I read the Teen Titans Metal tie-in last night (issue #12) and liked it quite a lot. It continues into the upcoming issue of Nighthawk, so it’s kind of like a side story that happens alongside the main story, and it’s not a bad premise. No spoilers but I’ll put it in spoiler quotes in case people want to go into it cold:
First to go back a bit—when all the Dark Batmen appeared, they did so through the creation of a mountain in the middle of Gotham (this mountain is where a bunch of the action in Metal #1 and #2 takes place). In this side story, the big villain of Metal, Barbatos, basically goes into Arkham and grants some of the inmates almost god-like power to fully realize their insanity without any limitations. These villains, now massively powered up, have each created a ring around the mountain that is sort of their “world,” shaped in their image. What happens in this side story, is that Damien, working alongside other characters I won’t spoil, have to make it through each ring to the mountain at the center. This first issue takes place in Riddler’s ring—essentially a giant labyrinth.
That’s a fun idea for a story! While it isn’t perfect—the villain of this issue is brought down a bit too easily, I suppose—I am really enjoying this Gotham twist on Marvel’s old “Inferno” crossover. As it is looking right now I would recommend picking up every book related to this event, without reservation. It’s not reinventing the wheel but it’s good, fun, epic comics.