What supplementary codex(es) would you most like to see for your army?

[The Sovereign]

For me it's a toss-up between the Prophets of Flesh haemonculi coven or the Kabal of the Black Heart. Would also like to see a Thousand Sons supplement (like everyone else).

[Mr.Pickelz]

Speed Freakz, and/or Freebootaz.

Bikerz need some new edition lovin. 25 points for a Ork slugga boy on a bike just ain't cutting it when compared to Space Marines or CSM's variants.

[Asymmetrical Xeno]

Pure Canoptek forces would be lovely.

[Tyrendian]

Iron Snakes. 'Cause, you know, THIS IS ITHAKAAAAAA! *kick*

on a more serious note though, Saim-Hann would be neat

[Littha]

Daemons of Khorne would make my day (though I suppose that would require a book for the other 3 gods). Maybe with some stats for an exhalted bloodthirster or something and a new warp storm table.

[This Dave]

Deathwatch. Would work with any Marine codex too.

[Pssyche]

Harlequins.

[troglodytesrus]

Fallen dark angels, Eldar craftworlds, harlequins or praetorian imperial gaurd :P

[The Sovereign]

Deathwatch. Would work with any Marine codex too.

Yeah, this is another codex/dataslate I'd love to see, especially if it integrates well with the Inquisition codex.

[Archon Charybdis]

I'd love to see a Swordwind codex with rules for a Court of the Young King, taking more aspect warriors in the troops slot, and maybe a beefier Avatar (they are the most warlike of all Eldar after all).