Okay, in my honest to god opinion, we have enough city-scape strongholds, Nar Shaddaa, Coruscant and Dromund Kaas.
The only place that qualifies as a nature themed stronghold is Yavin 4, Tat in no way is considered a nature based stronghold, when I think nature, I think trees, bushes, grass, and animals making babies in the back yard (that last bit was a joke btw lol).
I hear a lot that people want a Zakuul Stronghold, but seriously do we need another one? no, we got enough city based Strongholds for now, if any strong hold should be made, it should be an Odessan stronghold, besides, it's located in one of the safest parts of the galaxy for your character to be in at the moment in the story, story-wise Arcaan would find you a lot sooner if you had a home on his own capital planet. It's like a Jedi decided he/she wanted to live on Dromund Kaas.
Odessan is a beautiful planet (as far as we can tell), It's balanced in the force, it's not a Gaudy saturated jungle like Yavin either, it's just a nice, simple, forested landscape. Odessan stronghold could be that secluded nature retreat in the wilds when wanting to escape the responsibilities of the war and the fans begging for your autograph.
I guess what I'm really trying to say is... Please give us a better/another nature based Stronghold.