Just some ideas, though hard to guess without any idea of exactly how they will be implemented. Shape-changing and pets are basics of the class so we could assume they will get them in some form. Types of animal forms will, hopefully, affect builds/play style a lot. Standard DnD forms tend to be wolf, lion. bear. Two of those we have skins for already so...
Druids have access to healing, but make much better offensive casters with elemental damage type spells: wall of fire, call lightning etc. So you could be a very good offensive caster and back-up healer.
You also have to take into consideration, the re-done enhancement tree that will come out with druids. I hope it will make for some very interesting builds. For example:
Drow 18/2 druid/monk dual scimitar wielding tempest
Halfling 18/2 druid/monk assassin-animal form(lion)?
Dwarf 20 or 18/2 druid/evasion class-defender-animal form(bear)?
Half-orc 20 Druid-Ravager-animal form(bear)?
Any race 12/6/2 druid/rogue/monk-acrobat(assuming some implementation of Shillelagh)
14/6 druid/monk-animal form-ninja-shadow faded animal forms yum!
Human 20 druid-offensive caster-for the extra feat
All speculation, but druids should be fun. They have a lot of possibilities, and I look forward to all the crazy combos that builders will make and hopefully post
