We are already clear that you are absolutely certain based upon seeing trailers that it therefore totally sucks...never mind the ongoing positive reviews.
I'll take critical skepticism over a yet to be released film over the
more annoying types that stand in line before the they've seen a film proclaming how awesome it is. The later should be reserved for giggling teen girls going to see Vampire flicks, but perhaps I'm wrong.
The critics you've listed, including Ebert, are easily amazed types that have given films like Star Wars: Phantom Menace four stars as well.
Cameron will likely make his loot, and while I liked 'Titanic' and hauled around an xpensive set of CAV format laserdiscs of 'The Abyss' long before DVD's came out, I just don't get why Cameron gets this kind of hype. If he's 'King of the World' then Michael Bay is god emperor of the universe. At least use a story other than one I read in 'Heavy Metal' back in 1980.
Let me guess...the bad guys in this film will all be white, American, and many appearing in previous Cameron films. The aliens will have big eyes and be marketed at McDonalds. !Bing, bing bing, Bing!