>>96383759
They are being repackaged for now
Pity model Malys soon
Huge refresh in 11th Edition, either in a starting box, or if Orks are there instead, then normally during edition
There will be no scrapping of factions like this, dooming about this is so retarded and baseless it's painful to read even. 40k is basically complete and Deldar are few of the last things left to update. Nothing will need an update for years, if ever given how advanced plastic tech is. And what's worse for GW playerbase won't even feel compelled to buy hypothetical updated units of already updated models, given that no new progress in plastic molds will exist and no jump in quality will be present.
GW HAS to go full into subfactions and new factions to survive. Instead of scrapping, more new factions will be made, as if this wasn't obvious enough yet given what they are doing lately with Admech, Bolter Bitches, Genestealers and now Votann. They will continue do so by bringing back/fleshing out legacy/lore factions. Obviously Exodites will happen sooner or later and so will Lost and the Damned (Traitor Guard, Cults and maybe even they will be bundled with DarkAdmech to set them apart from loyalists). Slann too will exist eventually. Kroot and Corsair expansions are logical to make as well. They need more and more armies and subfactions of huge variety to make it easier to tempt as large amount of people as it is possible by appealing to various tastes.
This is why they rotate enemy factions in Edition starter boxes every time too, they have to force marinefags to start buying new factions and it works obviously given rising popularity of Necrons and Tyranids and this same will happen to Orks/Deldar soon.
Primaris as well exists to diversify amount of possible units they can create for Marines across all possible armor variants and subfactions that are Chapters.
tl;dr new factions and subfactions will keep getting created and expanded and not scrapped. Deldar are safe