If this vote fails, Frontier could still come back with a new offer later and then have another vote if the Spirit BoD entered into a new agreement with them.

If this vote succeeds, JetBlue could go blockbuster and up their tender offer significantly and still try and disrupt the F9/NK merger.

Although a passed vote will put JetBlue in a more difficult position, I doubt that the drama is over yet regardless of the outcome tomorrow.