While the Boston Celtics gear up for their championship parade on Friday morning, the rest of the NBA is already locked in on the 2024–25 campaign.Free agency is technically already underway, but players can’t enter negotiations with teams other than the one they ended last season with until June 30 at 6 p.m. ET. Should two sides then come to an agreement, a contract can’t officially be signed until July 6.But moves are already being made.The Pacers made the first big splash of the summer, reportedly signing forward Pascal Siakam to a four-year, $189.5 million maximum contract to keep him in Indiana. And things are only going to heat up from here.Here are three surprising offseason changes we could see this summer:LeBron James moves on from the LakersThe clock is ticking for “King…