So word on the street is those 12 will all be factory new unlike the mixed bag of used car lot 170s we've got this year. Hey at least most of the 170s, if not all, finally have printers.

What is most likely to happen here? Merger, closing it down entirely, or swapping out the 145s with the 175s?

Piedmont will shut down as the 145s get retired, and AA will flow the pilots. Those hired near the end will enjoy a faster flow than their peers at the other two wholly owneds. Piedmont has value as a ground service provider but Envoy could integrate that into their existing operation. The new 175s will most likely be operated by Envoy/SkyWest unless Envoy’s current safety mishaps continue, then which they will be operated by SkyWest to replace the CRJ flying out of DFW, LAX, and PHX. In my opinion, the new 175s will most likely be split between Envoy and SkyWest because the more SkyWest pilots AAG can get flying AA block hours, the less SkyWest pilots are available to fly for their competitors. And the recent investments by AAG into Envoy’s training facilities indicate growth is the plan.

You use the word "likely" very liberally.
As in, you have no clue, because no-one at Envoy has no clue, because it just happens to be whoever can cut costs the most when the time comes.

No one here has any clue until AAG tells us what to do the day before lol.

There have been several factory-new 175s delivered this year. I flew one the other day that had less than 100 hours on it, and I flew at least 2 others since June. The "improved" 170s with printers and real outlets had been a nice suprise though. Word from MX is that they are supposed to add printers to those that don't have them at some point in the coming months. Then again, as we know, "rumors" can be trusted as much as crew scheduling when it comes to staffing.

Well if you haven't heard, our lord and savior Ric Wilson emailed the pilot group a few days ago. Envoy will be hiring 600 pilots in 2025. Lots of growth in ORD. Good news to those who are waiting for a class date.

Any news about more 2024 class dates or is it just going to be the nov 18th class?

Not sure about December though I doubt it but doing quick math for 2025 to hire 600 pilots would be 50 a month. Thats alot for the disfunctional school house !

Envoy is rehiring a bunch of professional sim instructors next month and has been advertising for more. They have been doing line observation rides in preparation. Envoy has been managing recurrent training with current and retired line pilots, so it appears to me they are gearing up for serious training.