Hmm. That article is a year old, and Lewis is currently on stage in London in a different play (Mamet's American Buffalo). I wonder if this is something that's still in the planning stages or if it's fizzled.
That said, The Night of the Iguana is very worthy of a revival. The last time I saw it was an Off-Off-Broadway production a few years back, and even with little set and less than perfect performances, the text still sparked. It's one of Williams' most underrated plays.