So to fill the void with banter, I offer the following observation on names...
Even though the naming conventions don't track "quite" like this, it seems to me that one could argue the following:
Series "J": Distinctive angular body style
Series "S": Classic designs 5, 6, and 6.5--all seem to share some inherent consistencies
Series "T": The formidable T2
If pressed to name the new marker, I would go with a new "series" designation--the body is radically new and innovative. My preferred designator? "R".
The "R12" would be cool...in fact, R12 happens to be the scientific designator for the refrigerant freon!