Alex is a jazz legend
I hope Dave lives up to the hype. I'm sure he's capable of playing all the songs, less sure they can recreate whatever it was they had 20 years ago. The entire band has changed, personally and professionally, Dave's changed, it's good to be nostalgic but we all know it's hard to rekindle things from 20 years ago. Look at the differences in the last three albums which span nearly 10 years. The are all good records but you can hear the band change between albums. The band themselves is basically the same (no one counts a bass player change as major) but there is a progression. There has also been a progression since Dave was part of the band, to say there is unfinished business either suggests they are going to backwards or there has to be change. I don't mind either way but I very much doubt it just happens because they did it once 20 years ago.
I don't really care what Waters is doing, although I'd love to see him go backwards towards Alice In Hell, but if there was a contract signed I think it should be honoured. If he does leave Testament hanging I predict that they will issue a statement very similar to the one they released a few weeks back when Gene left them hanging. Peaceful, hopeful and diplomatic, yet plenty of fans still claimed it must have been a fight that initiated that statement.