Well played GW for the first time since AoS dropped I'm interested by a 40K release.
Imperial Agents has been a book long muted, I first heard it rumoured in 3rd Ed. I really like it as a concept there's always been lots of smaller fighting forces in the imperium who don't really consistute a full army (fluff wise) and who generally only take the field alongside the other armies of the imperium. I include SoBs in this I've always felt they've been rather conceptually stretched to fill a full codex. I've always enjoyed the idea of disparate nature of imperial armed forces so really happy to see this.
Traitor Legions, very very happy this has finally happened there's not a lot that hasn't been said already. I'll draw your attention to my Avatar that's one of my miniatures and I've modelled my VIII th to be usable on both 30 and 40K so it'll be nice to have 40K rules. I've also got high hopes for the fluff content Codex Black Legion was top notch on that front so I'm looking for more of the same.