Kinda interesting, though I doubt they trade a possible generational talent for a seriously injured superstar.
Obviously it would not happen for a variety of reasons, but Tatum having long term health risks should not be one of them. Tatum is young, tall & big enough that the achilles tear would not hinder him when he returns.
Flagg is a generational talent, but rookies do not win championships & Dallas only has a short window to win one. Davis could have 3 seasons left of elite production & Irving perhaps has less. When you factor in that Dallas does not have control of their own pick until 2031, in a few seasons they will be back to square one of having an elite talent in Flagg, and no one else.
Tatum is 27 and an MVP contender. Himself and Davis alone would be the best 1 - 2 combo in the NBA.
The only reason I am theorizing a Tatum trade to begin with are these new (harsher) luxury tax rules. If not for the 2nd apron taxes, the Celtics would just run back their core and probably continue being the favourites in the East. If the Celtics have to move two core pieces, the team may not have the depth to ever get back.
These new luxury tax rules have shortened every teams championship window.
OKC will have to pay Jalen Williams & Chet Holmgren max extensions soon & SGA will command a full supermax in two seasons. Something will have to give in regards to their depth, especially when you factor in they are a small market team.