No, I gave it an A rating in this thread and praised it, but some are treating it as if was 
Star Wars in 1977. Few comic adaptations ever walk on that particular street in terms of importance to film. Despite my own judgement of what were the greatest superhero films (some are just great 
films), I doubt any reached that level.
The use and introduction of the character in  
Batman v. Superman: Dawn of Justice cannot be underestimated; it was 
the big hook to sell the character, so the success of WW did not happen in a vacuum. It--like the MCU films--are part of a series, so its simply logical to acknowledge WW's appeal was generated by her perfect handling in 
Batman v. Superman: Dawn of Justice.
Wonder Woman is well known overseas, with the comic and a wealth of merchandising distributed in numerous countries for decades. As just 
one example, in 1979, the Japanese version of the now-defunct publication 
Starlog, featured a certain character prominently on the cover--
--and this kind of character exposure was not limited to Japan. So, Wonder Woman is not some new, underexposed or mystery character. From personal travels over the years, I've seen all manner of WW products, and the foreign language distribution of the Carter series as well as 
The Super Friends (with WW being one of the main characters).