Personally I don't want Shana to drag for a second season, mainly because action oriented stuff that drag for more than one season tend to drag for long and I already have Bleach in that area. One DBZ clone is enough for one time
. I mean, we already know most of the stuff and the like and there doesn't seem to be much left in terms of story to warrant a full second season, although it can spark the creation of some OVA. I'm particularly interested in that Silver fellow that caused Margery to be a Flame Haze.