CTV is what you want to see or the prediction market thing? If the latter, I think it can already be done.
I believe that this technique generalizes to any opcode that replaces an OP_NOP in P2WSH.
And it seems like it could be useful for any soft fork that proposes a new opcode.
I was referring to prediction markets. As for CTV, I don't have enough knowledge to form a well informed opinion.
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