User blog comment:Sosuke Aizen008/Can Yhwach use Yamamoto's bankai(Zanka no tachi) again?/@comment-10961564-20130928163113

yamamoto's dead for sure, his body was completely incinerated...there's no point in him being alive anymore

we still don't know much about the medallions and their working so can't say anything whether Yhwach would be able to use zanka no tachi or not....however, Yhwach knows a lot about bankais so he wouldn't have completely killed yama-ji if his death would render zanka no tachi useless(just a thought)