I would say at least one... possibly three
IT won't be averaging 28pts with another legitimate go-to scorer on-board. I actually also expect a scoring increase from Horford this year as perimeter defenses tighten leaving several post plays open. So a nod for Horford, Hayward and IT is possible.
On that note it is also possible for several players at the guard positions to have better statistical years than those on our team and as such get All-Star nods over them. Players like Lowry, DeRozan, Giannis, John Wall, Ben Simmons, Brogdon, Kyrie?, Kemba, etc.
The unfortunate truth is that having a balanced team, is the worst thing for individual honours such as an All-star nod.