A trade has to be coming, Ainge traded down to get one more tradeable asset plus if Hayward and Tatum are both really coming, there are too many players at SG and SF.
Assuming:
IT Rozier
Bradley Smart
Hayward Crowder Tatum Brown
Horford
Zizic
It would make sense to trade Bradley and Crowder for either Jimmy Butler, Paul George, or Kevin Love. If they got Love in a 3 way deal with Cleveland getting George, it would help Indiana. They get two reasonable contracts plus we can throw in better picks than other teams (I'm talking Memphis and Clippers picks not potential lottery picks)
George is obviously the most risky because he could leave in one year. I really think Love would be a great fit. Sending George to Cleveland gives Cleveland a good shot this upcoming season, but then he and James could leave for LA. Then Cleveland has no one outside of Irving, who then will want to leave. This also keeps the Lakers from getting George now and making their 2018 pick not as good.
Will the Bulls trade Butler, nobody knows. He is cheaper than Love and a better player. Would cost better picks, maybe the future pick we just got for trading down plus a 2019 pick?
IT Rozier
Smart
Hayward Tatum Brown
(Love or Butler)
Horford Zizic
Going with Butler makes us more of a small-ball team with 4 guards, Butler and Tatum would be at the 4 a lot.