Bangkok Pundit weighs Reuter's list of four "next" options for the Kingdom, and adds a fifth of his own. Here they are ordered according to likelihood as ranked by BP:
1. Police storm airport
2. Judicial coup*
4. Military coup
3. King intervenes**
5. PAD protest group backs down
* This is the option BP added to the Reuter's list. BP explains: "PPP is dissolved next week, before HM the King's birthday, then so entity takes over, the so-called judicial coup option." In his most recent post summarizing the events of Friday, BP discusses the resignation of 5 PPP party members. BP quite reasonably surmises that this may be a tactical move to pre-empt next week's possible dissolution of the PPP.
** BP comments "If there is widespread violence with more than 100 people dying then this seems the only chance, but before then less than 5% chance." Andrew Walker at New Mandala asks if the palace has not already expended its quota of political capital on the crisis. Jonathan Head of the BBC asks whether limitations on the physical stamina of the eighty-year old monarch limit the prospects of such intervention.
Personally, I lean toward viewing option #2, "judicial coup," as most probable. It seems to me that this option both saves face and minimizes risk for more powerful figures than any other.