There are three detachments that you can use for Dark Angels with the new codex according to the most recent leaked images. Including the Lion Blade Strikefoce, there is a Ravenwing Strike Force and a Deathwing Strike Force. The leaked images are French, but we have some translations here that reveal the detachment options we will be getting.
Leaked image are here
http://www.bolterandchainsword.com/topic/303857-rumours-dark-angels-codex-interrogator-chaplain/?p=4091042
translated by beastrouille on Bolter and Chainsword
There is a leak from the french WD saying so.
The detachements are called Deathwing Strike Force and Ravenwing Strike Force.
Here is the image for those who read french:
For those who do not read french here is a quick translation:
second paragraph:
"Of course this is not the only way (i.e. the Lion's blade) to assemble a DA army. Instead of a DA semi-company why not use other detachements. A DW Strike Force would make a visually impressive army with all these bone-white armours [...]. Thanks to this detachment, it is possible to field a force constuted only of DA 1st company and lead by Belial or why not the new Terminator Librarian."
Third paragraph:
"The other detachement of the codex is the RW Strike Force including units from the second company only [...]"
EDIT: I forgot to credit the one who posted that in the first place. So thanks Master Avoghai (who I am sure you know already) to have posted that on the french DA forum