Oh my God everyone, stop crying! So what? It is taking a long time for them to make an album. It's not like a walk in a park. If they want the album to be amazing, they have to take their time and not rush themselves.
I think they'd have to wait about 7 years before they make a Linkin Park RB, because Green Day has been around since like the early 90's and the Beatles have been around like forever. So Linkin Park doesn't have much of a song library compared to these too. So it would make it hard to choose the challenging ones.