There is the Natami which for nearly ten years has promised to be the next Amiga.
If you don't want a Power PC enhanced Amiga, then you will have to wait for someone to do an FPGA one.
Also remember the abandoned Boxer Amiga? He couldn't finish the AGA because of the lack of documentation. I wish he had released it even with ISA AT/XT 16-bit slots... There would have been so many add ons you could have had.
What kind of specs do you want? Feel free to try and gather funding, somebody can point you to a site that will allow that.
