NEC will actually buy a licences for the ARM chips and actually continue joint development for future Arcade and console releases. Nintendo is going to ask Sony to create a graphics chip for the SNES, it would be something akin to super fx2 chip only with more code usability and the benefit of having a r3000 cpu to run alongside it.
So NEC will get a controlling share in ARM(maybe the one who apple dropped to fast when newton was a failure?) that is interesting, so Nintendo would got for superpowered SNES-CD? whihc year? if 1991 will be limited as 1993 one.