One could argue that they would use the DMCA (or whatever legal grounds possible)and claim that the device promotes pirating of the Amiga IP, threatens Amiga patents, and promotes piracy etc. though use of the kickstart roms and ADF files, etc.
Cloanto's AF would solve legal issues. Porting AROS to Minimig would cut out AI off from any grounds for complaints. If Minimig not using any IP from AI (logos, trademarks, etc), I doubt AI is going to give a rat's ass. This won't even reach their RADAR because it's not what they are attempting to make money from.
OTOH, Minimig drawing Amiga folks away from AI entirely would probably make AI a very happy company. Afterall look at the Kent Sporting Arena fiasco with "our" finger prints all over it. If we all go away and focus on Minimig vs AI, would probably make AI a bunch of happy campers.
Dammy