Unfortunately at the Shizuoka model show Tamiya didn't have any new 1/16 tanks to show, and thats where they generally announce new models.
They did show their new range of 1/25 IR battle tanks, but sadly nothing larger except their new range of metal tracks, that look exactly like Impact or Kenny Kong's, but are twice the price
I was hoping for a Cromwell, sadly Tamiya don't seem to make models that the community want.
Cheers,
Rik