Genma is a Jounin unlike Hayate who was a chuunin ... it'll be cool if we actually see him doing anything...

what erks me is that guy with the hokage was also a jounin and he died like nothing... booo.... (Well i think hes a Jounin any way since he was part of that meeting the hokage had with all the jounins)

The reason they are using kunai's and Shryikens instead of ninjutsu is that its just faster to do... doing a bunch of seals in the middle of a big battle is gonna get you killed.