This was inevitable - Google takes a laissez-faire attitude towards copyright violation on Android market, which is full of ripped-off IP - games with names and artwork belonging to other companies, rip offs of Rolex logos for clocks, etc - that I've personally reported and that have always been ignored by Google.
If they don't care about the small stuff - and it seems they don't - something nastier was always going to come along.
Hell if they'd bothered to notice one of the submitted apps was 'Spider Man' perhaps this would already have been averted.