By then he will be at least 12-14 years removed from that type of ground level work.
Even as a former president, his words will carry more weight on a national level and he will be careful about what he choses to get involved in. You see how the media spins anything he says on social issues now. Multiply that by 10 when he's citizen Obama without the White House staff team to help mitigate the negative spin. It might be more harm than good for him to be that involved.
I see him thinking more in terms making statements as a former president and statesmen and doing all the other things former presidents do.