First Gundam definitely will suvived in Japan.
And also some Matsumoto works will do.YAMATO,999,
Harlock.
Others having chance are Doraemon,Miyazaki's Works
off course Teduka Anime.
These title arledy suvive over 20 or 30 years.

Here is recent suvey by over 180,000 people vote.
which is most favalite Anime in japan.

　1.First Gundam
　2.Lupin the third
　3.Doraemon
　4.Doragon ball
　5.YAMATO
  6.Girl of Alps:Haiji
  7.Evangellion
  8.Joe for tomorrow
  9.Star of Giant
  10.Detctive Conan
                            tadashi