If you asked a random joe off the street who the three most iconic DC characters are, they would probably say Batman, Superman, and Wonder Woman. In spite of Diana's iconicity, more often than not, her title fails to reach the attention, sales, and acclaim garnered by the Caped Crusader and the Big Blue Boy Scout.
However, there have been eras in which Diana has enjoyed great success in comics, such as the original William Moulton Marston run and George Perez's Post Crisis reboot.
It seems a great creative team who respects the character's history while at the same time is willing to go in new and interesting directions could salvage the Wonder Woman title from constant mediocrity to a fruitful renaissance that can last years arter the creators leave the comic. Examples of this include Mark Waid's Flash and Geoff Johns' Green Lantern.