@PCSPounder I don't follow F1, so don't know the history that much. Seems like a "done deal" from all the articles I've been reading. (But when it might happen.
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)
LVMS is nearby and already hosts a couple of NASCAR events annually. (There's also the Mint 400 off road race.)
So racing fans do know of Vegas as a destination.
As to timing in a season, the best weather is October/November and April/May. (Gets really hot after mid-May, and the high desert winter does have biting winds and occasional freezing temperatures that could keep the fans indoors.) NASCAR events are March and September (but moving to October), IIRC.