I don't see any news about that on the TT site.

The Rainbow was my first Tarptent ( I wasn't brave enough to get the Virga then...) so I like it as it is. Mind you mine is now two models old, still works..
But I will keep you posted.

Personal comment. I tend to like symmetrical designs, like the Scarps or the DR. Apart from esthetics they work better in the wind. So right now as a solo I like the Moment but would consider the DR instead of the Rainbow to get two entry points and two mesh walls for views and ventilation.
Franco