WotC has stated they will be doing a druid in the future, which will be heavily based around wildshape. Necromancer's Advanced Player's Guide, due out much sooner, has a druid as well. In order to avoid the conflict mentioned above, we specifically designed the druid in the APG to be heavily based on nature-oriented spellcasting, not wildshape. That way, when the "official" druid comes out, they're still both usable, since they cover very different niches, even if they're both druidic in feel.