Boooom!!!
Image 1: A chronollogically alligned cambrian explosion of colors and characters where the old band personallity is left behind for the bands to be re-born into a completely new skin that was necessary to deal with the darkest and most challenging aspects of the Journey. 'Achtung Pepper Lonely Baby Hearts' is a transformation happening synchronistically in time (see the 3rd image below) in both bands.
Image 2: not too many words are necessary to contemplate this wonderful parallelism, but keeping on with album cover clues, look at the top right corner in the Achtung Baby sleeve. See how U2 is right in the middle of that crowd, much like The Beatles in Sgt. Pepper...actually this is only the beginning of the supernova explosion...wait until you see the colors in the next connection.