Saw a programme about it t'other night. It was really quite interesting. Surprising how well some of the old stuff stood up, interesting to see what they've been doing since (especially Gilliam - what a nutter!), and revealing on the schoolboyish competitiveness between them. Really, bright English public schoolboys are emotionally warped/stunted like no other creatures on earth.
As to whether the new shows will be any good...hard to say. They'll be greeted with massive enthusiasm by their devoted fans - which of course always helps with anything comedy - and I'm pretty sure a good time will be had by all. Very few 'new fans' tho', would be my guess.