Edit: The opening sequence got my inner history nerd in a twist. If its 933AD, Heinrich would NOT, I repeat NOT be wearing Gothic plate. Hadn't the art guys ever seen a picture of the Bayeux Tapestry? That's a hundred years in the future, but it'd give them an idea of what a well equipped knight would look like in that time period. Not wearing armour that hadn't been invented yet.
Oh, and the super secret rocket plane? Of the 2 really cool jet designs they had designed as scenery they chose this [http://en.wikipedia.org/wiki/Bachem_Ba_349]. That thing was not some super advanced rocket fighter, it was literally a rocket with a man strapped to it,a substitute for SAM's because of problems getting guidance systems working. It's job was to zoom up, unleash its payload and parachute down. The Me163 would have been a better choice for a fighter, though neither would have the fuel to get to Malta.....it's like they didn't do their research or something!