I have seen the prototype for a few items...

Headmasters

Not-Brainstorm
Not-Chromedome
Not-Hardhead
Not-Minerva
etc....
and
Not-Fortress Maximus (currently in design mode and not yet prototyped)
There will be 6 initially with the others coming based on their popularity. Menasor, Broadside etc will be the first ones to come out.