No I don't believe he could or would. Him joining would upset the power balance of the SH crew and he just doesn't belong in that crew. He's simply far too wise, mature and strong. In my opinion, it would just be a waste to see him join the crew as he would have to constantly be nerfed and side pushed to give the main characters the spotlight, like Sasuke and Naruto in Boruto. He was also a former Admiral aspiring to be a fleet Admiral, I just don't see him dancing to Luffy's tunes.
However, I do see him joining or already being a part of the Revolutionary Army with Dragon and Sabo. His personality and power would fit perfectly.