Twelve is a comic where twelve World War 2 heroes get frozen to sleep and wake up in the modern day. Here they have to adjust to modern life while the government hopes they act as heroes and show the world what heroes are meant to be. This is following events such as Civil War where heroes fight each other. Spoilers follow.
Tonally, I am not sure what this book is trying to say. The heroes come out, some come out and try to be heroes quite successfully. But then they just end up arguing amongst themselves. This isn’t helped by the bad guy being one of them (in fact the best of them, the Superman stand-in). And in order to drag out this mystery, a pretty weak deus-ex machine plot device is used.
Even the scenes of them trying to fit into the modern world, despite filling a big slot of the book, are not well handled. It is effective, however, in showing that there were things not always black-and-white even with the heroes of old. The rest is just the usual of change in police procedures, life on the wrong side of the road vs idealism, etc.
This book would have been better if there was a villain, perhaps a similar frozen villain. After criticising (in-story) all the hero vs hero stuff at the beginning, it devolves into a hero vs hero finale at the end.