I am optimistic that Pita will be PM and form a Government. He will garner enough votes from MPs and Senators to become PM.
I think the US, for sure, plus other Western Governments have laid it out plainly that Thailand will be a pariah status state if the democratic will of the people does not prevail.
Prayut and Prawit have made no inflammatory statements; they understand the consequences.
It's diplomacy and won't make the media headlines.