Well lets get that criteria in motion....I think it should be simply as stated "Focke Wulfs and Messerschmitts" we initially think WWII and the most obvious 190's and 109's but there are ample other aircraft in kit form besides these, including some what if's, they all should be in the mix to provide a wide range of subjects.
Throw in your ideas and lets get things sorted...we are approaching the starting line..!