Well especially with all the new players we can zanticipate a long series of 10 game lineup experiments to gather data on combinations.
The real question might be how long before Brad tries this lineup out, and how ready Tatum is/will be for NBA defense, both to play it and beat it? Once he's ready, because I think Brown already is, that lineup could - go - all - the - way!
Horford would be the 5th starter if that happens soon enough. That's a contender alongside the Warriors.