I'm usually not a huge fan of mixing rock and symphony
For me one of the best live nma gigs, was that special line-up with two drumsets, violin, cello, windharp? and i think if they do an orchestra set, it will just add to the sound. Imagine ocean rising with an orchestra...waaahhh

But there are many possibileties for great arrangemets in the songs and much of that what would come from the synthesizer could be played live with instruments, trumpets, etc..
Of course it would be great if the do a little tour with that line up, but i think it's hard to get good venues for that. so i think this tempodrom concert could be one special event.