ALEX GIBNEY’S powerhouse of a documentary studio, Jigsaw Productions, is nearly finished with “LANCE ARMSTRONG: THE ROAD BACK.” It documents his 2009 comeback competing in the Tour de France. In light of the cyclist’s pending doping confession, to be broadcast this week on Oprah’s OWN network, Gibney’s doc has an even greater appeal. Was Armstrong still doping in 2009? If he wasn’t, is that why he didn’t win the race? Plus it’s likely that Gibney captured Armstrong’s diminishing hubris. There is a strong possibility that the arrogance that surrounded his seven consecutive tour victories was enhanced by the drugs in his body. Gibney has said he thinks his work on this film is some of his best work. Can’t wait to take a look at it.