If replaying the trilogy is a hot desire, just do it now, ideally on PC where you can crank settings, tweak LOD draw distance, inject a bunch of shit, use insane fan made textures if you really want, and generally play the absolute best variations of all the games.
Maybe a trilogy HD port will come one day, but AFAIK it's clear that day is not in the visible future. EA has made it abundantly clear last gen ports are not their focus. Word from EA, BioWare, and the grapevine have clearly articulated a desire to move forward with the new direction for the series. The focus for EA and BioWare is guaranteed to be 100% on Andromeda, not ports. Obviously anything can happen. Obviously there's a space for the trilogy port. Obviously plenty of people here and elsewhere would eat it up. But based on what we know I think it's just as obvious that it's not on the schedule.