Let me explain the Hitler bit.  Cockneys VS Zombies is a very silly film.  Funny but quite silly.
To start the trailer, we thought it best to illustrate the many obstacles London has overcome to remain the proud city of cockneys that is today.   So we showed a few.  I really enjoyed making these style-boards, though another approach was also submitted and chosen for the final trailer.  Main title design was created by the ever-talented Adam Bennett - TheVideoShopLondon.com