Dark Eldar are not being removed from the game. That rumour, originating from the 40Kforums site, I believe, was from a person much sillier than yourself, and was about as reliable as a political pledge in a modern democratic environment.
Ratlings are not going to be taken off the shelves, and I have no idea where you got this from.
Orks, much less than two years, are the very next codex to be updated. They will have many new plastic troops.
Necrons are going to be updated, as is every army. It's just not known specifically which those will be beyond Dark Angels and Orks.
Moderators, since one of their duties is to enforce the use of language in their forum, are expected to be able to use said language properly.