Honestly I think they might make a small move to fill out depth and what not, but nothing else. Even if CLE falters (Irving traded too?), GSW are just too much unless TWO of Curry/Durant/Thompson go down to injury. Even then it's tough.
I think Ainge's hope is that, as early as next summer, he can have two-Top 5 picks and potentially use those picks via draft OR package one or both of them in a deal for KP or AD, depending on how their team's seasons go (Knicks project to be horrible, Pelicans might be okay but depends if AD-Cousins pairing works well).
But I'm not seeing much star power available in the trade deadline anyways (not even KP, or Davis, and most of the "disgruntled stars" of the past season have already been traded). But it's a long season and surprises happen so who knows.