Only possible if Gust wants to do it just like having an Ar tonelico 1 and 2 HD collection. So basically if Gust wants to do it, it's possible. If not then no. Only Gust can answer that question, but they did remake both games for PSP already for Mana Khemia that is.
I hope Gust can remake these games for the ps3, unless Mana khemia 3 comes out or something like that (If Mana Khemia 3 is announce at all). I really love Mana Khemia 1 and 2 but since I got the ps3 slim, I can't play my ps2 games on my ps3 which sucks!!! So I was hoping either a remake collection will come out or Mana Khemia 3 is announced.