Well you can't blame Obito for how he is acting. After all he hasn't actually spoken to Kakashi in a long time. He just needs to vent right now.
On the other hand Obito TnJ'd himself at this point. It's like he wants to swap sides but, it is too late. He will probably end up sacrificing himself.
Obito will b!tch a little more but I doubt there will be any real fighting between the two of them.There would be no point;the entire fight will be one sided and it'd make no sense(plot-wise) for Kakashi to die in such a manner.
It's hard to believe anyone's still interested in that fight. I only hope they skip it like the Kakashi vs. the 7 swordsman fight and Madara vs. the Kages.
Enough with Obito, no one cares anymore, you're beating a dead horse.