Another third party could be making a case for it if he does not supply one but things can change in development and a case may or may not come with this device. The A500 is probably the most compatibility with old floppy disc games,but how compatible with a accelerator I don't know.
Imagine a A500 all cleaned-up to look brand new with a nice side case will it look out of place against a A1200? My answer would be no.
User(s) should always welcome new hardware be it right or wrong as who else would do it.
A500 all cleaned-up with accelerator could bring back entry level new users to amiga.