There is no way they would do that. SMTs and SCOT tokens are in direct competition. SCOT will either grow to be so much more sophisticated in capabilities to SMT that people keep using them, or they will be discontinued.
In all likelihood, Steem Engine will go on to become a layer 2 solution just like most sidechains are doing now such as Loom, Blocknet, Matic. Steem Engine will still be very valuable as a market for trading crypto and also for interoperability between Steem SMTs and all the other blockchains.