A virtual Easter egg is an intentional hidden message, in-joke or feature in a work such as a computer program, web page, video game, movie, book or crossword.
As you can see on the startup screen of WC,there is a Kixeye tattoo on the soldiers arm.
I also saw this letter "MU" on the rock atthe startup screen,maybe the artist of War Commander.
If you hold shift and press up,down,left,right consecutively you can access a screenshot menu where you can do stuff.(courtesy of GigaByte)
Take a look at the sniper's rifle,there is some dogs,and it really looks like the "Zynga" logo.