Well ...
If we assume Vasquez, Napoli, Pedroia, Bogaerts, Sandoval, Ramirez, Betts, Castillo get your 8 starting positions. (and yes, I work off the assumption Ramirez is cool with this, just because enough reports seem to indicate this was his idea)
That leaves either 5 or 6 positions depending on whether they carry 11 or 12 pitchers. I'll say 12 pitchers - however insane I think that is in 2015, it is the likely composition. So, who are the 5.
Well, one of them will be a catcher of some stripe. So, that takes us down to four. Now who? Well, Holt gets a spot ... since that allows us to only carry one additional infielder. I think Victorino, Nava and Craig are the remaining three. How the PAs split - some sort of combination of competition and matchup. Now what is fascinating is that I absolutely could see any of these three or even Bradley (as unlikely as that seems) screwing the order up. I am only dismissing Cespedes because everything about him screams trade bait.