MF doesn't have to vote for or against. It can abstain.
Keeps hands clean by not supporting the junta as promised, doesn't vote against the party which is its more natural partner thus deescalating, and then bides its time till the next election ... where history will most certainly not be forgotten.
And in the meantime shows its prowess as a powerful and positive parliamentary force in opposition that the electorate can trust not only for its policies but also to keep its word and behave like the only genuine democratic party available.
The OP its a massive junta friendly smoke screen, purporting to be political science, with the sole aim of obfuscation and smoke-screening what is shaping up to be a grotesque perversion of the election result.