|Solving the case of the hidden rebel base was his last great mystery.|
While Battlefront's bailiwick is 15mm, and I'm not denying that 15 mm modern armor would look really impressive on the tabletop, 6mm makes a whole lot more sense. The first big reason is game scale considerations. 15mm on a 6x4 table works pretty well with the technology of WWII. For modern combat, even though basic infantry engagement range is basically the same, all other interactions are going to be at much greater distances. Better optics, thermal sights, computers, and laser designation is going to force ranges into the game that the scale is not going to support well. Movement will be wired too. Modern armor movement will put all but the fastest WWII tanks to shame. Models that can move anywhere and shoot anywhere on the game board can make for some weird game-play.
6mm would solve all these issues. you'll get the abstract ranges for shooting and movement that make for good game play. You'll also be able to include more of the really neat modern elements right on the board. Ones that would have to modeled as off board assets otherwise. That way your A-10s and long range artillery are actually persistent units on the table and not just glorified counters and templates respectfully. Otherwise, they are going to end up with what feels like a clunky re-skin of Flames.
The announcement didn't include any art or photos relating to the new game. Neither did the FoW pacific expansion or the modular building line. I think this was to keep competitors in the dark while still building interest. They don't want Plastic Solider Company to preempt their releases with more affordable alternatives. These alternatives to BF's products has been a thorn in their side for the last few years.
Fulda Gap on the other hand... There will be Abrams and T-74s. If PCS was inclined, I bet they could get some of the major units to market in 8-12 months time. Zvenda already makes these in 1/100 as well. But who's got modern armor in 6mm? GHQ. Maybe a few garage shops. Basically the type of competition BF blew away when they first came out with FoW. It's a great opportunity to flank their competition with a new product no one is prepared to answer for.
They are also promising units for all the major factions. That's a lot of models even when you consider the homogeneous nature of more modern armies. It becomes much more simpler when you release a single sprue with a mix of Abrams, Bradleys, and Paladins on it. Their FoW range is so huge they are having problems keeping it stocked consistently. A 6mm game could be construed to require fewer SKU with smart packaging.
BF has also tried two modern-ish Flames of War re-skins, and both have not been super popular to my knowledge.