There are two new lenses:
SAL55-300 (yes: -300)
And a new version of the current SAL300-2.8G (here at Amazon).
Other already available lenses got a new “UC” suffix which probably means “Ultra Clean” (Click on name to see the current lens at Amazon):
From the past experience that those kind of leaks are very reliable. I heard of an updated SAL-70200G coming at Photokina so there is a fair chance Sony may update all the other mentioned lenses too!