Will it be possible to make animations without reloading the scene?
Not quite sure what you mean here. You hit the "Render Animation" button on the OctaneRender for Poser options dialog. It then automatically renders each frame in the range you have selected. You don't need to do anything else. A full scene transfer from Poser to OctaneRender for Poser is pretty quick, so the overhead is low. The only limitation is that you cannot animate octane settings (so emitter intensity, etc will be static throughout the animation). You can however move the position and size of the emitters.
I will post a video of this process in a few days time.
Right now I save out all the OBJ's for animations and they of course have to be reloaded for every frame.
The plugin handles all this for you.
Will it be possible to save the scene as .OSC including OBJ and textures into a folder?
This is in the current version, but there are some limitations. I need to find solutions in order for it to be in the final version.
Almost all the time I need to edit the OBJ to subdivide low poly figures and objects in MODO or bake new textures as there are too many for the GFX card to handle. And I also reduce texture sizes in Photo Shop as there is also the texture limitation.
There is a script which will merge the V4 (or Alyson, etc) Head, Body and Limbs maps into one map (it re-UVs the figure - you then manually merge the maps into quarters). This drastically reduces the number of image maps in the scene. The script for V4 is at Sharecg. I can provide more details if you need. I've developed another script to do the same thing for Alyson and Antonia. As far as subd goes, Snarly has a good script to subd a figure inside Poser. It does a great job (I just wish you could specify which mats got sub'd).
Will it be possible to remove all the nodes you don't want in one click, like removing all bump, specular maps etc., to keep the number of textures down?
There is a template system which helps with this, but the easiest solution here is to run a tiny python script in Poser to remove all the bump/specular maps in the Material Room. Then load the scene in the plugin. For anything that's not a close-up, there seems little value in bump or spec maps - Octane seems to produce amazing results without them!
You could also have an option to reuse the diffuse textures as a bump map texture which I do a lot.
Again, I'd be tempted to do this in Poser prior to running the plugin.