Hmmm... yeah, smear campaign started early i'm afraid!
I saw somebody on Twitter mention this... and although it is complete bull**** by all accounts, the post you replied to shows that people will believe anything they read!
For the record, I have seen several posts saying that they are hearing very good things about both Wonder Woman and Justice League... when it comes down to it I believe my own eyes... we all have different tastes.
My preference is for the darker DCEU –*I like the tone, and love the characters... whereas, although a lot of people obviously loved it, I really didn't like Dr. Strange for example... very, very average - saved only by Cumberbatch being a damn fine actor.
These reports always say the same thing "Wonder Woman/Justice League etc is a mess". Couldn't be more vague and any insider smearing the movie at this stage is likely to have an agenda anyway. Of course it's possible the movies will suck, or get bad reviews at least, and those claiming to have had inside information will feel validated.
I'll say now both will be great. If if turns out they are, then obviously I have inside info or the ability to accurately predict the future.