Ahhh! Personal bugbear, so I'm sorry for having a go (I do this every time!), but there was never going to be five.
I mean, yeah, there was. But it wasn't like they were planning on doing a quintet of cover albums. There's no such thing as "The Five Covers." It was just gonna be a continuous thing for as long as they kept getting two-nighters.
"What are all the aspects involved in covering an entire album by another band? What does Mike take into consideration when picking an album? faq id: 302
MP: As you might know, I have the first five covers picked out already."
First five. The fifth cover isn't any more significant than the first or the twentysixth.
...but, no, I don't think they'll do it. Probably not, anyway. Which I'm okay with! I never went to the cover album nights, as I didn't fancy paying full price to get an hour of music by a band that I might not even like. Too much of a risk. I go to DT gigs to see a DT gig. :p