Indeed "Big Meets Bigger" is a part of the german title, because there is another movie from Germany with the title "Rampage" only from 2009 made by the german director Uwe Boll
As with READY PLAYER ONE Amazon.de is showing different artwork for the 4K + 2D release compared to the 3D + 2D release ... thinking I prefer the 3D steelie in both cases:-