Elon Musk is now a trillionaire. Is his next big move a merger between Tesla and SpaceX into a $3 trillion behemoth?

Following SpaceX’s splashy record-setting public offering last month, that’s the big question on many investors’ minds. But Musk’s call with shareholders on Wednesday provided few answers.

When asked about a possible tie-up, he didn’t commit either way.

“There’s going to be more and more overlap (between the two companies),” he said. “But obviously… we can’t talk about combining companies and that kind of thing on an earnings call. It’s got to be done with the appropriate process.”

Musk did, however, mention possible advantages of combining his two massive companies, such as using SpaceX’s Starlink satellite internet service in Tesla’s robotaxis, or cooperating on artificial intelligence efforts. SpaceX and Telsa already formed a joint venture in March, a factory in Austin called Terafab to fabricate microchips.