Layers of meaning

This comes from a rusting metal door a few streets from where I live. I've no idea how it got there, though it has a Banksy sort of artiness about it. Zorro and X-Men seem to have been added at a later date and may have had no original connection with the central image (although, of course, they do now). The street, really no more than an alley, leads to the house of a local artist, notoriously shy and intolerant of praise. I'm sure there's no connection between the two, or there wasn't before this post. I wonder where the baby comes from and why he's ringed in blue like this; if there's any sense to it.