MultiVersus' upcoming open beta will have multiple new playable characters.
The last big bit of news we got for MultiVersus was that its open beta would be taking place in July and that the Iron Giant would be one of the characters included in it. It was assumed that no other characters would be added with the open beta considering no others have yet been announced, but the game's director has seemingly confirmed that there will be a few more.
Over on Twitter, MultiVersus' director Tony Huynh regularly answers questions about the game and acknowledges requests from fans. In this instance, one fan asked him whether the Iron Giant will be the only new playable character included in the game's upcoming open beta, or if there would be a few more characters. Although Huynh didn't say how many, he did confirm that the open beta will have multiple new playable characters.
Huynh said, "Yes, more characters are coming. I’m very excited about it too!", confirming that the open beta will have at least two more new characters than the closed beta. It could end up being more than two, but Huynh's use of "characters" makes it clear that, at the very least, The Iron Giant isn't the only fighter that'll be added in the beta.
As for who those characters might end up being, there are a few sensible guesses thanks to several datamines that have taken place over the past few months. Two that seem very likely are Rick and LeBron James, as the most recent datamine has revealed that data for all of Rick's moves and cosmetics are currently in the game. Rick was also one of the first characters included in the design document, so he's clearly been planned for the game for some time.
LeBron seems like another likely candidate to appear in the game for the open beta as dataminers were also able to find a good deal of his voice lines and an item that seems to be related to his moveset, implying that he's nearly done.