Everyone should go read my arc comparison list from the 150. If the comparison holds as well as it has been so far then Dondorii should be comparable in arrancar strength to Ikkaku (non-Bankai Ikkakku from when Ichigo first fought him). The similarities are uncanny, Ikkakku acted like a goofball and made fun of Ichigo. Dondorii acts like a goofball and makes fun of Ichigo. Dondorii brings up Ichigo's lack of battle instincts, Ikakku brought up Ichigo's lack of battle instincts...since they're in the same situation as before, I would expect the same outcome. Ichigo will get knocked around, then he'll get serious and one shot Dondorii.