Hello everyone !!!
As you know, this Saturday the SM codex goes on pre-order. This is the first Power Armour codex for the 9th edition of Warhammer 40000. This codex will include rules for nine loyalists First Founding Chapters, as well as the Deathwatch and those successors whose renown almost rivals that of their parent Chapter.
So all the codex are included, I don't know what's going to happen to the Specialist unit of these codexes but I guess we are going to wait for the already announced supplement to play them. (SW, BA, BT)
the new codex includes full rules for creating your own Successor Tactics, too. All you need to do is pick the two Successor Tactics that best identify the character or play style you have in mind from those 19 listed
Back are the days of Mix Maxing chapter tactics ^^
You can check the Space Marines round up here