It could happen if The 3rd Birthday gets enough sales. I've been sending mail to Square about putting the first 2 games on psn since ps1 classics were first realeased. I'm going to go ahead and pretend that this is Square's way of acknowledging me but we all know their terrible reputation of not listening to their fanbase (ff7 remake anyone?). Buying PE 1 and 2 would cost $200 to $300 on ebay and I'm not so good with money so hopefully we'll get this.
http://www.videogamer.com/news/parasite_eve_could_come_to_ps3.html
http://www.videogamer.com/news/parasite_eve_could_come_to_ps3.html