I think as a business decision it makes no sense to kill Steem, when both blockchains can come out stronger, especially when he owns so much Steem currently.
Why kill something you just invested so much money in, unless it will make the original company somehow stronger. I don't see how killing Steem now makes Tron stronger.
I'm looking forward to the future as I have a feeling that this will go down like the fork wars did in Bitcoin. Something that makes Steem come out stronger.