In all honesty, I don't think you can leave the front like that. I mean, I get it, it's an ocean... but you need something else. Be decisive and pick a good picture to put on there somehow. "Too many good ones" is a lame excuse and kind of comes off as lazy.
I still think the whole thing would look better with one continuous (i.e. not changing when you get to the back) image across the entire background.
The jellyfish image is too busy to use as a background, it competes with what you're trying to put on top of it. Again, why I think a more broad, non-descript, vast view of the underwater ocean would look great as a background.
Something along these lines, maybe? (Although this is hardly anything close to perfect, and on-second-glance might be a bit too similar to "National Geographic" rather than "Disney Nature")
[attachment=14788:HRCBLURAYPreview.jpg]
Also, I'm not sure you have the right template. Download the Buena Vista one from the Blu-ray templates section of the site. I usually remove the front and top of the back stuff (the pointless barcode and Disney Movie Rewards crap), but you can pick and choose what you want to keep. But I'd suggest leaving the spine and bottom-back legals sections fairly untouched.
Keep it up, it's getting there!!!

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