Many people can say that 2011 was a giant mess but in perspective, it was quite an interesting year.
A look at some of the newbies and their major wins/success:
Petra won Wimbledon, Madrid and the YEC. (+YE #2 ranking)
Caroline won IW (and Brussels
...and SF of AO, USO + other titles, also claimed YE #1 ranking)
Agnieska won Beijing (and San Diego, Tokyo after adding to her game)
Victoria won Miami (and made SF of Wimbledon and the F of the YEC + YE #3 ranking).
In regards to the veterans, we saw Maria have some some success, reaching the SF of RG and the F of Wimbledon but nothing to indicate she will be a dominant force next year, despite being #4 in the ranking. Serena came back from an injury but showed that she's not quite where she needs to be, despite a nice streak in the USO hard court season. Clijsters had a great run at the end of 2010 and beginning of 2011 but fell off the face of the planet for reasons I don't even remember anymore.
We also had some of the old players find success with Na reaching 2 major finals (and winning one). We also saw Stosur win the USO in breathtaking fashion.
A lot of players also went missing, either away from the tour or from their brains: Henin, Safina, Chakvetadze, Dementieva, Clijsters, Kleybanova (get well soon), Jankovic, Ivanovic, Serena (back), Venus (coming back in '12)
So, in a sense, 2011 was a battle of the old and new generation. How do you see things panning out in 2012, with the potential of seeing all of the familiar faces in Australia? How about after the Olympics when some players are expected to retire?
Personally, I see Kvitova having major success in a few parts of the year, but not all. I also see Radwanska, Azarenka, and even Wozniacki making improvements in their games and possibly reaching the finals of some of the majors. I also see Maria having success at RG, just based on past years. As to everything else, I don't have the slightest clue.