Trying to guess which of the young players will get to the all-star game first. Giannis is the first of the young group. Guards, coming in, almost all have zero shot, asides from perhaps Booker and Beal, so LaVine isn't listed.
For the East
Tier 1: Porzingis, Embiid
Tier 2: Turner, Parker, Simmons, Beal
I don't see any of the big men getting in over Butler, Lebron, Paul George. If Giannis has an off season next year, maybe??? If Love isn't injured again, then he's almost guaranteed too. But otherwise, Embiid and Porzingis have a good shot of getting in over an older Millsap and Carmelo, though I'd say if this year is really just a test run for Embiid, and he gets more minutes next year, then he probably has it locked up.
Beal would have to beat out - Lowry, DeRozan, IT, Kemba, Kyrie (fan vote), Wall... yeah. He was the better injury replacement this year for sure, although for that spot he has to contend with Porzingis and probably Millsap next year.
For the West
Tier 1: KAT, Jokic, Gobert
Tier 2: Wiggins, Booker
It's easy to argue for Gobert getting in over Hayward over DeAndre this year. Davis (barring injury), Durant, Leonard, Boogie are all untouchables. Gasol and Draymond, are the sorts of players that maybe get screwed for starters' voting, but coaches will very likely back them up, although I could see KAT get in over one of them. Gobert and Jokic vs Hayward is tough, DeAndre is probably gone next year.
Wild card would also have to watch out for Chris Paul being back and pushing Klay or Lillard into one of those spots. Only way I see Gobert getting in is some mix of Hayward not getting in, Portland having another off year, Timberwolves continuing to struggle, and and then winning argument of Klay and Jokic