If you do the math, the Led Zeppelin concert reunion at the 02 in London was 5 years ago. It wouldn’t make sense if it was a 5th album ’cause “Houses of the Holy” was their fifth. Anyway, I’m excited for this ’cause I will buy the 02 live show on both Blu Ray and audio CD…but who knows…maybe the announcement will be totally different and it could be a new Led Zeppelin album. Maybe the boys have been in the studio for the last 5 years, quietly recording a new album without letting us know about it. We’ll just have to wait and see. I’m excited for this myself.
Kev
K'Brocking 
The chances of a new album are precisely 0.0%
Never know though. Led Zeppelin are always full of unpredictable surprises. Before their 02 reunion, people said the same thing. Saying there will be no chances of Led Zeppelin ever playing live again, well they just did 5 years ago. If they can do that I’m sure they can do a new album together. All we have to do is wait, wait, wait. Maybe this is a count down leading to their big announcement and they’ll reveal it next week.
Kev
On top of all this, if you do your google research, Dave Grohl once claimed, that Led Zeppelin has been making new music together, so a new album is possible.
Kev
From this article here:
http://www.zimbio.com/Foo+Fighters/articles/xWHf6XNEFzZ/Foo+Fighters+Led+Zeppelin+2013+Tour+New+album
Kev