Nah, at least Arthur would get rid of some Capcom competition, insignificant as his chances were as the next rep for that company. The only character I could see benefiting or suffering from this situation is Sol as it means Nintendo got in contact with Arc System Works, and even then, it probably means absolutely nothing for him.
You know, thinking about Sakurai love for the more "classic" entries of a franchise, I wonder if they'd just reuse the GBA/DS objection clips for the courtroom if characters like Apollo and Edgeworth cameo in over getting their respective voice actors for whatever languages Smash supported again to record some new lines (Phoenix would clearly need new stuff as he'd need to record yells and the sort). I forget if we already discussed this before, but hey, it's on topic with AA.