Nastia wasn't on a World Champion Team. I am a huge Nastia fan, even bigger fan of her father. However, Team competition is different that individual (yes, its gymnastics which is more individual than cheer) however, the U.S. hasn't won a World/Olympic team title in a while. We just won, why not stick with what's working?
in a while? USA won in 2007! and silver at the '08 Olympics! 2009 Worlds was not a team competition, but USA still took 1-2 all-around with two girls that weren't on this worlds team, and a silver medal for the team last year! USA's field is very strong and deep, and keep in mind that the London Olympics is a five member team. It is not a six member team like these World Championships.
Also, a comeback to strong gymnastics in only one year is a very difficult task, ever for a gymnast like Nastia. I loved Nastia in her day, but I just don't think this Olympics is for her. Shawn, however, could up her difficulty and return as a strong all-arounder. And even Alicia, is a very strong gymnast but this World Champinoships proved we have even more talent beyond her. I would surely assume Jordyn Wieber and Aly Raisman will be on that Olympic team next year. But keep in mind just how deep the field will be to pick that team from... there are still more juniors to come up next year that can even challege.
Contenders for the 2012 Olympics:
Rebecca Bross - If she has a good comeback, could be an all-arounder.
The Caquatti - Both strong bars workers.
Gabby Douglas - Upgrading on bars, and pretty strong all-around.
Shawn Johnson - Has a lot of experience, and is making a strong comeback.
Anna Li - Bars only, really.
McKayla Maroney - Current World vault champion, and making upgrades all around. Decent floor.
Chellsie Memmel - Consistent, tough, experienced, strong comeback.
Aly Raisman - Experienced, consistent in team finals, huge tumbling, probably upgrading vault.
Alicia Sacramone - Good three event gymnast, working on vault upgrade. 2010 World vault champ.
Bridget Sloan - 2009 World AA champ. To be honest, I don't like her gymnastics. I think she's getting weaker and may be out of the runnings.
Sabrina Vega - Proved a strong member of this Worlds team. Hit when it counted.
Jordyn Wieber - 2011 World AA Champ, National Champ, consistent and strong.
Lexie Priessman - Will be coming into the senior rankings next year. Powerful vaulter, has an Amanar. Strong all-around too.
Kyla Ross - Coming into senior rankings next year. GREAT all-arounder. 2010 Junior National Champ.
Mykayla Skinner - Coming up next year. Decent all-arounder, powerful vaulter with Amanar.
Nastia Liukin - IF she can make a good comeback, will be strong on bars and beam.
So you see, a LOT to chose from.