Kemba, I think, will be the only Celtic to garner a shot of being voted onto the All-Star team for the Eastern Conference via fan voting.
For guards: 2 of these 3 will voted on as guards: Kyrie, Kemba and Beal
For the 3 forwards/center position I see these guys getting voted in before any Celtic: Embiid, Gianni's, Butler, and Siakam.
After that, at this point, I think the others Celtics likely to make based on how they have played, in order of most deserving to least is:
Hayward
Brown
Tatum
Smart
Now, Hayward won't make it in if he comes back in late December but if he returns in mid to early December and plays like he was he might make it and be the most worthy of the 4.
Brown has a good chance of making it as a guard if he continues to play like he is.
Tatum would need to become much more efficient to make it.
Smart doesn't stand a chance of making it. Guys scoring just 12 PPG with 5 APG that shoot 39% from the field and 34% from three don't make All-Star games. I don't care how good their defense is.
Jimmy Butler is really not that popular.
Last season Tatum had more votes.
NBA ALL-STAR VOTING 2019 PRESENTED BY GOOGLEEastern Conference
Frontcourt
1. Giannis Antetokounmpo (MIL), 2,670,816 votes
2. Kawhi Leonard (TOR), 2,092,806 votes
3. Joel Embiid (PHI), 1,710,229 votes
4. Jayson Tatum (BOS), 599,289 votes
5. Jimmy Butler (PHI), 569,354 votes
6. Blake Griffin (DET), 500,072 votes
7. Vince Carter (ATL), 273,719 votes
8. Gordon Hayward (BOS), 237,813 votes
9. Pascal Siakam (TOR), 206,290 votes
10. Al Horford (BOS), 199,474 votes
https://www.nba.com/article/2019/01/10/all-star-voting-2019-second-returns-official-release