No one is going to get rich reading tea leaves to predict the outcome of the US-backed terrorist invasion of Syria. There are so many confusing events that it's difficult to keep track of trends that might indicate which way the war on Assad (and the majority of Syrians) is going. That's why few people have noticed certain positive developments that may indicate that Obama is seeking a way out with what is left of America's honor. Whether this will lead to a stand down of US efforts at regime change will depend on whether Obama is willing to risk yet another confrontation with influential neocons who are still intent on crippling Iranian influence in the region through destabilizing the Syrian government.
The most recent round of peace talks are not likely to be the sham that previous ones were. Despite Kerry's tough talk of a Plan B, the US has dropped demands that Assad step down as a precondition to a deal. The alternative to a negotiated resolution, recently leaked to the Wall Street Journal, would involve escalating the conflict by providing more dangerous weapons to the jihadist "rebels." However, the plan is most likely being presented as the only credible alternative to capitulation to Russian demands in Geneva. Knowing how man-portable air defense systems (Manpads) could be used by the terrorists in the wake of a collapse of the Syrian government, supplying them to the al Qaeda-affiliated anti-Assad forces would be lunacy. It would make little sense for Obama to give in to Saudi demands to do so at this point, when he has resisted the temptation for five years.
Erdogan may be starting to see the futility of further attempts to take down Assad. The most recent evidence of this is a series of high level Turkish visits to Saudi Arabia and Iran. While Turkey and Iran have common economic interests and a mutual desire to prevent the emergence of an independent Kurdish state, it is hard to imagine that they could make much progress on working together as long as Turkey is pursuing a foreign policy course that is an existential threat to Iran's status as a regional power. There are other compelling reasons for Erdogan to try to make nice with the Sauds, but it is unlikely that he will be able to thaw relations at the same time he is negotiating with their nemesis. Unless, that is, they are also discussing letting go of the goal of toppling Assad.
There are also clues that the Obama administration US efforts are being stepped up to curb further Saudi aid to terrorist "rebels." The barrage of criticism that the Saudis are taking in the US media is unprecedented and most likely orchestrated. It is also somewhat risky, in that it highlights the cynicism of US "humanitarian interventions" against targeted dictators while it is allied with the most brutal, repressive regime in the region. From Biden pointing out that it is the chief financial sponsor of terrorists in the region to recent critical reports on the generally politically correct Frontline and 60 Minutes to Obama's announcement that the government is about to make a decision after two years on declassifying the 28 pages of a report said to implicate high level government officials in financing the 9/11 attack, the heat is clearly being turned on these feckless "allies."
Cynics who charged that this was only a ruse to buy time to regroup for a renewed attack on Syrian forces seem to be ignoring evidence that the situation has changed since the earlier attempts to "negotiate" a US-dictated solution in Geneva. Realists in the Obama administration seem to be serious this time. Kerry was forced into agreeing to talks by the timely intervention of Russia. He had no real choice. Had the offensive continued unchecked, Assad's forces would have routed ISIS and Putin would have been able to dictate terms. This is what forced Kerry to agree to peace talks despite having to bargain from a weak position.
In addition, Erdogan's panicked response to the prospect of new peace talks suggests that he believes that the Americans are looking for resolution. Having responded to advances by the Russian and Syrian militaries and Kurdish defense forces by stepping up threats, he doubled down once talks were announced, at one point declaring that an invasion was not off the table although when directly confronted with Russian accusations, he denied any such intent. The Turkish military was reported to be against such an ill-advised action, but troop buildups along the border had convinced many that he was serious.
The Turkish call for invasion was echoed by Saudi Arabia, which offered to take part in a joint campaign if it was led by the US. This was obviously just bluster. After all, the threat of invasion was the result of Erdogan's frustration at US unwillingness to prioritize defeating Assad or to abandon its alliance with Syrian Kurds in the fight against ISIS. There was no way that the US was going to support an invasion that would risk WWIII by targeting both the Kurdish YPG and Assad, backed by Russia and Iran.