This was typed on a phone, so sorry in advance for any weird spelling/grammar errors.
So I'd say we have a problem. There are only Lord Packs remaining for Warhammer II, which means there's a reasonably good chance that we could see some lord packs for the game one races. The catch is that game one is no longer supported and is very different from game two. If CA were to make new DLC for game one that is also compatible with game two, they would have several options: backport game two to game one so the two are basically the same version, release two different builds of the same DLC for the separate games, or release a game one DLC that can ONLY be used in game two. None of these are great option. The first two would require a pretty significant amount of time and effort on CA's part, and the last one would be an especially bad option as it is simply bad business practice.
To give an example for that third option, say they released a Greenskin DLC for game two at a price of $6.00. In this case, if I only wanted to play Greenskins with the new content and wasn't interested in the game two content, I would have to buy a $60.00 game that I didn't just to play $6.00 content (assuming I already had game one). Needless to say, this is the worst option for the consumer, and CA would instantly lose at least my support and respect.
So that leaves the first two options. Would CA backport, or would they make two different content versions? Like I said before, neither is a great option from a business perspective, as both would require more time, effort, and money than a regular DLC.
Personally, I think that backporting and updating game one would be the best in the long run, as it would resolve the other options and make it much easier to create content for game one in the future. It would add the game two factions to game one (mainly Skaven) and allow access to the game one map for many of the factions (and I honestly hardly interact with the new world factions when playing the old world factions in ME anyway).
And I don't really see any other way to add new game one stuff to game two aside from these three options. Now I'm no coder or programmer, so I might be missing something obvious, but these are some serious barriers to new game one content that aren't easily resolved. Anyway, eager to hear other people's thoughts because I'm rather skeptical that anything other that FLC will be added for the game one factions.