The main thing he would be buying is steemit.com. My guess is that he wants actual users more than anything else. I would doubt he would have any interest in developing and progressing the Steem blockchain or token, so my guess is he would just try to use the acquisition to get everyone over to Tron which would probably spell the end of Steem. Sure people could still run Steem nodes and keep the original chain running, but in reality Steemit, Inc controls Steem. They control the only real developers on the platform, the exchange relationships, the main app on the platform, etc.

Of course, this is just a rumor with really no basis so far, so it all may be a moot point.