Grey, EarthRuby and SeaSapphire then the new region. It seems they're sticking o that pattern.
What pattern? If the D/P-->Pt-->HG/SS(new games-add on-remake) is what you talk about is it not a pattern, as gen lll went R/S-->FR/LG-->E(new games-remakes-add on) so there is no pattern.
They have done different things each time, so there is no pattern, except from that it is none.
However I personally hope we will get R/S remakes first.