So I did a little more research and I think this modified picture is quite enlightening. Sorry it's hard to make out but it's the best I can do with GIMP at the moment.
We now have flame fronts with angles of eccentric shaft and the temperatures at those flame fronts that match up with the chart. I have a few more pieces of information that I will be posting throughout the week coming from SAE paper 860560:
Material Technology Development Applied to Rotary Engine at Mazda
by
Takumi Muroki and Jun Miyata