This isn't false. The negotiation really is occurring. We don't know if the Guns N' Roses confirmed.
I've been working on and off as a small gigs promoter for the past 3-4 years.
If everytime I was negotiating with a band, I went out and announced that the band is confirmed to play any city... most fans would kill me.
Negotiating doesn't mean "CONFIRMED".
It means, I make an offer and you're thinking about it, or you're asking for an amount of money (and all the extras that go with a big gig or a series of gigs) and I'm thinking about it.
From what I see here, the promoter has made an offer and the band is thinking OR will think OR might think about it.
And Jarmo didn't post this cause he "thinks" it's not true.
He asked someone for information.