Never heard about such a thing. Sounds like some sort of conspiracy theory unless you have concrete proof of that.
The original hypothesis was that some other animal sold at the market acted as an intermediate host between bat and human, just like the case in 2003 SARS, but this is also not proven.
Conspiracy theory has a specific meaning. Their claim might be false but even if this is the case they are not implying the existence of any conspiracy.
The virus came from bats. The "wildlife market" in question sold raw bat meat. How else would it have gotten there?