Watching the previews (and the movie), there were 2 themes that seemed remarkable:
1. Digital animation and special effects get more awesome every year.
2. Our music tastes in movie soundtracks are still living in the 1970's and 1980's.
It's not like they've stopped making music since the mid-80's. Maybe using these soundtracks increases the appeal to adults (I'm not complaining, believe me. Just making the observation). Maybe it's all they can think of. Maybe it's cheap. But consider:
Toy Story 3 (itself a franchise 15 years old, which is really hard for me to believe) features the songs "Dream Weaver" (Gary Wright, 1976) and "Le Freak" (Chic, 1978).
Movies shown in the previews included the upcoming animation flicks:
Alpha and Omega, about 2 wolves, featuring "Hungry Like the Wolf" (Duran Duran, 1982).
Megamind about a superhero and his arch-foe, featuring "Highway to Hell" (AC/DC, 1979)
Not only that, as if the 1980's revival thus far of 2010 (The A-Team, Clash of the Titans, Nightmare on Elm Street, and The Karate Kid) isn't enough, movies coming out in the rest of 2010 include:
Tron- Legacy (original Tron, 1982) which will feature Bruce Boxleitner and Jeff Bridges again.
Red Sonja (Original Red Sonja, 1985) which I'm assuming will not feature Arnold Schwarzenegger this time.
And even more frightening, 2011 is bringing us a new Smurfs movie.