Alright, it's time for a "way too early starting lineup." Here's what I expect to see:
Note: While using a 4-2-3-1, note that Poch and Bielsa never used a symmetrical version of the formation.
Using this as a template:
------------Lloris------------
Walk--Lovren--Jan--Saborit
----Paulinho--Capoue---
Lamela--Eriksen--Kono
-------------Remy--------------
Lamela will take over the role similar to Rodriguez', so he'd be almost flat with whoever the striker is and consequently the field will be flipped, including both wingers and wingbacks. On the striker, it is the position I'm the most uncertain of. Remy is up there for now because I view him as our most realistic target, but that is extremely susceptible to change (so please preemptively unwind your panties).
Konoplyanka would effectively be substituted for Ward-Prowse's position, but flipped of course. Kono would not only fill the position, but improve upon it with his ability to cut inside and thereby incorporating not only the benefits of Ward-Prowse, but also Lallana's traits with his ability to cut inside and interact with the other attacking players.
The major likely alternative to all of this of course, is Poch preferring to use Chadli in the Rodriguez role. I think that would be excellent, but risky with a new LB (despite the player's familiarity with the system). Rodriguez was allowed to play where he was because he had such an excellent, hard-working, and defensively aware LB in behind him. Kono's general defensive awareness meanwhile, would allow Saborit more time to adjust to the league. The last point opposing Chadli being used in the Rodriguez role is that Lamela isn't particularly comfortable on his right foot and is best used cutting in, and while Townsend is more comfortable on his, his crossing from that foot is likely not sufficient. It is possible Lennon would stay and play that role, but I highly doubt such a thing would happen at the expense of Lamela, who I've no doubt Poch will inevitably favor.
So there you have it. Only biggest changes will be personnel of course at LB, LW, RCB, and ST, but I do feel confident we'll see the rest as written.