"Allegedly the plan was to do the entire Lamb properly"
Well I'd go and see it! I did hear a rumour that Banks, Collins and Rutherford got together with Gabriel to jam (I don't know if Hackett was involved or not) but I don't know how much truth there is in the story, if any. I'm sure the Collins/Banks/Rutherford lineup is more commercially viable than a reunion involving Gabriel but I doubt the money (Although sure to be HUGE) is the reason for this reunion as they've all got a few quid by now. I suspect it's much more to do with playing those great tracks again with an incredible light show and through speakers the size of Texas in front of 80,000 people who all think you're the bollocks. I can see how that must be fun...