Ok, just had a very quick look at Octane, it has a similar structure to cycles in terms of how its been integrated into blender, but there are differences in the render passes. So might not work out of the box, but will have a go at starting a render to see whats up.
The plan is that we'll support whatever is in demand really. We're rebuilding our addon (though I have to admit the rebuilding has been taking a hell of a lot longer than I'd have liked thanks to life being life) and it will be a lot more capable of serving other addons, and definitely other render engines.
Also Octane would be a good choice since its very similar to cycles in how its been integrated with Blender. I was actually surprised they didn't just go with an addon, but actually released their own build of blender.
Ok, just had a very quick look at Octane, it has a similar structure to cycles in terms of how its been integrated into blender, but there are differences in the render passes. So might not work out of the box, but will have a go at starting a render to see whats up.