If you think for one second the Celtics will get past Detroit, then you're dreaming in the first place.
Detroit has more playoff experience and the better team chemistry.
They need to get past the Cavs first. This is no gimme win for the Celtics at home. Lebron could go crazy in game 7 like he did against Detroit last year.
In any case, the Pistons will beat a tired Celtics team, coming off back to back seven game series, to win in six games.