This is my thought on all of this drama
1. Rondo wants to stay. Ray Allen made a comment several seasons before about rumors that both of them might be gone by the deadline. Maybe it was a joke or nothing serious, but Rondo took it seriously and this is where their relationship went downhill
2. He wants to stay but also wants the money and more star quality players in the lineup. If Danny won't offer the type of money Rondo is looking for and/or can't add star level players (nobody to dance with) and Rondo does get the money he is looking for and guys like Harden, Cousins are begging him to come over, there is a real good chance he will leave
3. Danny knows Rondo has to play for his life this upcoming season. If he does, he can get ready to make an offer by the all star festivities. If he does but won't commit to resigning for the long term, then Danny can trade him for more at the deadline.
4. If Rondo just plays a little better than last season and his injury looks like it will permanently affect him, Danny will definitely look to trade him to a playoff bound team (but likely won't get as much as if we traded him now).
5. Danny has Marcus Smart and worse case AB ready to take over the starting PG spot.
So bottom line is, Rondo has to have a great year in order for him to stay with/lead the team for the long term. The team has to produce wins also and be better than last seasons version. If not, DAnny knows Rondo might walk by the end of the year.
Imo the realistic outcome is going to be what happened in 2012-2013 season. Rondo does put up decent numbers, but hogs the ball, doesn't play focused defense and the team doesn't get anywhere. Rondo knows how to stat pad and learned to do it from the best (PP, KG). But those guys also knew what it took to win games, if it meant to give up the ball to a hotter scorer or take charges and do different things on the defensive end to get stops. The worse thing Danny can do , is sign Rondo for the next 5 seasons, we keep finishing 9-11th, never get a decent draft pick , nobody wants to come here to play and remain stuck in mediocrity