Definitely not, he's completely loyal to Maleficent and Onyx is her team, so he'll never leave it. If she told him something like 'it doesn't matter what team you're on you're still my knight' he would... still stay with Onyx because most of his closest friends are on there too...

IF COMPLETELY PUSHED OUT I would say maybe Citrine because they're fun? He's not really that familiar with too many hero teams though.

How do you think Spitfire would have functioned if he'd been a knight instead of a hero?