But we will always have original FFVII and we don´t have to consider any of these spinoff/sequels as canon. I don´t consider Dirge of Cerberus or Advent Children as any kind of real sequel because they are so away from atmosphere of FF7.

They need to make remake that somehow gives a hint of sequels, original VII is meant to be stand alone story so everything just then suddenly happens in sequels without any good ties.

Actually two remakes are needed. One is ps3 remake and other would be only a port to PSP with a dungeon and better translation just like GBa- remakes. PS3 needs would Resident Evil style remake where even the story is little different. I mean it would cool if Aeris would die later or earlier just to shock players and plotlines like Cloud and Rufus are brothers.