There is no doubt that our original ColecoVision console is dying.
There could be another need for a new console like the Phoenix VGS. And we know that Eduardo dream about a console with his own format.
If you want to support the ColecoVision people, you should definitely focus on developing a console still based on ColecoVision. It can still be a new system based on the 68000 + Z80 environment as you like, but it should, like the Phoenix VGS, be familiar with ColecoVision in the form of a single cartridge port for original ColecoVision games.
The console must have the necessary graphics and contemporary sound chips.
I imagine a standalone console with built-in ColecoVision + SGM1 in a 68000 + Z80 environment.
There should only be one pcb mounted and one single cartridge port that can handle both ColecoVision and 68000 based games. You can call it the Opcode Super Game System (SGS).
The new 68000 + Z80 based games should be in the same cartridge shell, with a new SGC2 or SGC3.
I can see a problem in not being true to the original games and there should still be a market for ColecoVision games. CV + SGM1 have limits, same has 68000 just don't make games that aren't bigger than they really are or can be.
And yes I agree, arcade ports is a must for our ColecoVision fans.
And I think there is a basis for both options in a single console.
I think CV+SGM should still be supported together with your SGC1 which I also will support like the Phoenix VGS.
Based on my own opinion and sorry my english.