So I noticed there was a total eclipse recently on some island and then the Idea struck me and a vision unfolded in my imagination.
What better way to hide the Death Star 2 in a battle than behind a solar eclipse. The Death Star being behind the Planet and the light behind the death star. We also get quite a bit of symbolism from an image like this like the light is fading and darkness will prevail. I was imagining as the planet would cross the star the Death Star 2 would emerge into it's Black Heart. I think it's an image that movie goers would not forget in a long time and well I have to say that it could really have it all and be something that could really bring a massive epic feel, fantastical and symbolism also quite magical in an elementary way. The Dark Side of the force conjured in an image and deceitful by nature hiding in the shadows.
But with that said I like the direction you are heading in and I thought I would throw this vision I had at you as a perhaps artistic direction if it fits with what you are trying to achieve. It seems that you wanted to create more of a surprise for the death star 2 and I think this really could be a shocker that people would not forget. But it all really depends on what you want to achieve and how far you want to go.
If you wanted the Death Star 2 to threaten to obliteterate Coruscant (Equivalent to obliterating all civilization) then not only will you have a frame of reference for the death star 2 position in space but also from the ground up from innocents on Coruscant people looking up at a solar eclipse.
It's a diifferent way of showing the countdown timer from A new Hope I suppose in that reference but done in a quite mystical fashion rather than technological readout. And it's actually a bit scary too. I mean where would everyone be looking during a solar eclipse. Up in the sky.
The Land goes Dark and then goodbye baby BOOOM! Or will the Sun shine again?