I'm not on my own PC so I can't edit pictures right now, but is this a possibility?
Lay it out something like this:
___________________________________
|STAR [UFO PICTURE] the MIRROR|
| TREK [ ] UNIVERSE |
To me it seems that the "mirror universe" part of the title actually has more to do with defining the game than the "Star Trek" franchise declaration, so equal size, style and color font would be appropriate. This way you could have it balance out between the left and right half and give "mirror universe" it's appropriate prominence, and of course the flying paper plate divides the two halves by default. And even the dividing in half kind of gives it a mirror-ish mental effect while you're reading it.
