Development has started on porting Animus to the following 3 ARM based microcontrollers:
STM32 family
SAMD21 family
MSP432 family
This is in preparation for a to be announced project codenamed Legio for a next generation no compromises design.
The porting of Animus to non-Arduino specific platforms (Arduino works on some of the above listed uMs but Arduino isn’t very good for them) should be quite smooth as Animus is mostly C and utilises very little Arduino specific code other than its HID modules (which has analogues in the above uMs).