I thought D.J. was asking that T.J. make 125 first with another opponent before agreeing to fight him. Did he withdraw that prerequisite? I didn't realize he was prepared to go forward with T.J...
I agree with your concerns but there's also a possibility that if D.J. loses to Cejudo then Cejudo's star power rises as the only dude whose been able to take the belt from D.J. That could become a valid selling point.
But personally I don't see that happening, it's become so hard for me to imagine D.J. ever losing. I know it's possible, but maybe only a small chance.