Is the Led Zeppelin reunion-tour glass half full or half empty?

Led Zeppelin's Robert Plant, John Paul Jones, and Jimmy Page.

After the latest statement on the long-rumored jaunt by legendary guitarist Jimmy Page, it comes down to interpretation. At an appearance in Tokyo, Japan, to promote the iconic group's latest best-of compilation, Mothership, Page didn't rule out a tour, but said anything would have to wait until September.

"The amount of work that we put into the 02 [one-off reunion gig in London as a tribute to Atlantic Records founder Ahmet Ertegun], both for ourselves rehearsing and also for the staging of it, was probably what you'd put into a world tour anyway," Page said, according to the Associated Press.

But as previously reported, Page noted that Zeppelin frontman Robert Plant has tour plans with Alison Krauss, with whom he recorded the widely praised Raising Sand in 2007.

Plant "also has a parallel project running [with Krauss], and he's really busy with that project, certainly until September," Page said. "So I can't give you any news on anything at the moment." Page and Krauss begin a world tour in Louisville on April 20.

Page admitted that the scale of media interest about Led Zeppelin's reunion performance put the band under a certain amount of pressure during rehearsals, but insisted the Led Zep chemistry was still there.

"We'd all agreed to take it very, very seriously and have a really good time at the same time," Page said. "We worked out the songs we were going to play, and it was exhilarating, it was fantastic. Every week was a week to look forward to."