Probably the last season of Giannis in a Bucks jersey if they will come up again short this season. 
https://www.jsonline.com/story/sports/nba/bucks/2020/12/15/giannis-antetokounmpo-signs-supermax-milwaukee-bucks/3843891001/
He will signed a supermax deal with the Bucks, I doubt if he will be traded even if the team will fall short this season.
The coaching staff has to be replace I guess, I think that's the first thing they have to do, just like what they did with the Clippers.
Players are not usually the problem, it's the coaching IMO.
Let's wait for Giannis decision, I'm not sure why he is still not signing that dotted line though. But he has a super max contract on the table, and just waiting for the final day before officially accepting it. But then again, Giannis should really bring the Bucks to the finals, that's all great players do. Maybe he just needed another superstar in the team.
But if he failed again this year, I think the coach head are going to be roll and then maybe we will see another set of trades to acquire another superstar to help Giannis bring Bucks the championship.