Nice build.
To make that possible, you would have to make a sandwich with the motherboard down, the DVD in the middle and the power supply on top.
I have not taken measures to see if that would be possible, but even if it is so, how useful is a DVD in 3023? I haven't used the one I have on the table for years...
For the moment I'll leave it like this, I'm in the middle of another build, that if, it suits me, it will be really retro-surprising