Considering the way Obradovic has constructed the team and uses the roster, Panathinaikos's depth chart has only three positions: backcourt, PF, C. No pure forward that can play both the 3 and 4 exists, and all the backourt players (except the pure SF Perpe), can play at least 2 positions, so almost any combination between them is possible. Therefore, the 12-man roster, provided that Saras stays, should look like this:
Backourt: Saras VSpan DD / Nicholas Perpe Tepic Calathes
PF: Fotsis / Tsartsaris
C: Pekovic / Batiste / Shermadini
Sakota is, as Trifilli pointed out, a FA, and imo it would be a huge mistake resigning him. It seems that his offensive game is not improving and his D is subpar for a top level team (not quick enough to guard a quality SF, not strong enough to guard a quality PF). For a team like Panionios he could become a valuable member, for a team like Panathinaikos he's just not good enough.
As much as I admire Chatzivrettas's commitment and poise, I think that it's best for him to move on and seek more playing time in a team such as Aris (who are rumoured to be interested). After all, he's still 32 and not yet diminishing, as the energy he shows on the court would tell you. It will also be good for the team, as Chatzi's minutes will inevitably eat off a bright prospect's (Tepic, Calathes) playing time that is much needed for their development.
Verginis should be loaned out, he is evidently the weakest player in Panathinaikos's backcourt, and will see no playing time again. And while it is very important to train with legend guards every day, playing time for a young player is of the essence. Thus, I don't think that another year for him being the 13th man would benefit him or PAO.
Kecman is most certainly out, no need to discuss about him.
Therefore, if Saras confirms the reports and resigns, after Tsartsaris's decision to pit in this summer and provided that Shermadini is really as talented as people say, i really don't think that Panathinaikos should sign any other top-class player. More players would disrupt the balance of the team, there are simply no more minutes left for anyone else to get a decent rhythm going. The team is (near-)perfectly tuned, minutes will be shared between top-notch players, there is a healthy ratio of experienced/young players, no 07-08 phenomena of players at their top of the game excluded from the rotation and evidently losing confidence (Becirovic).
That said, I think that Panathinaikos should sign a young and promising PF-C. Not Velickovic or anything, just another Shermadini. Batiste and Tsartsa are not getting any younger, so it probably would be wise to look ahead for somebody to give an induction year to, just like they did with Shermadini this year.
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