I was thinking of Abueva a little. However, Abueva would need big-time discipline to stay in SoKor. Plus, he's 33. Sucks, because he's our best FIBA-eligible wing. Him and Gabe are aging already. Oh, yeah, I forgot about Calvin Oftana. If he gets good enough in the PBA after a year or two, he might be considered.
As for bigs, yeah, they have to contend with imports, whether on the pick-and-roll or in the low post. Greg and June Mar will get pick-and-rolled or pick-and-popped to death. Same with Ian Sangalang. Japeth has just signed a 3-year extension with Ginebra. Raymond Almazan and JP Erram, sure they're mobile, but are they good enough, and is TNT willing to give up Erram?