Getty The Miami Heat are preparing to go all-in this offseason with a few young stars emerging as potential backup plans if Giannis Antetokounmpo is out of reach. The Miami Heat are preparing to go all-in for a superstar this offseason. They finished 43-39 and suffered a tough Play-In exit, forcing the front office to consider major changes. The goal is clear: return to contention in the Eastern Conference. The headlining target has always been Giannis Antetokounmpo . But if Miami cannot pull