Actually what I really wanted to see is a brand new 68k CPU upgrade. If physically possible and could be done to upgrade the CPU speed from 50 Mhz and even the avoided overclocked 100 Mhz to something like real 100 Mhz to 200 Mhz. If 68k can go as fast as 500 Mhz...it would be an awesome welcome....this way with such speed it will give a decent freedom to implement more complex and CPU consuming software and/or applications.
It's not going to happen - getting ASICs fabbed these days isn't cheap if you want 500MHz CPUs. There are ASIC sharing companies, where multiple designs are taped out at the same time onto the same masks, maybe that would be an option.
But before all that, you need a compatible CPU core. TG68 is fine for a low-end core, but would it clock up to 500MHz? There is the Apollo core, but that's very new. Maybe in a couple of years there will be FPGAs with it in that aren't horribly expensive, with ~100MHz cores.
And I guess you could then have a very fast clockport to go with it!