It still goes against your notion of "scrambling", as the foundations were always there. They just found an opportune time to do it. What's wrong with that? If you're a DC fan at all, and I'm skeptical if you truly are(I think you're more of a Nolan fan), than what's wrong with that?
I feel you may be reading a bit too much into the word "scrambling". I just meant it in the sense that they wanted it to happen, didn't really have a solid plan to make it happen and were throwing stuff at the wall that didn't stick. Maybe "struggling" would have been a better word. This was something that had happened on an individual basis with Batman and Superman at the studio too, so it's nothing new. Again, my point wasn't to be all like "WB has no plan, this is rushed!", the point of my post was to give Snyder some credit for coming up with the plan because JackWhite was under the assumption that BvS was all a studio idea (like many originally assumed), when it has since come to light that it was really Snyder's pitch. We all know WB has been pretty clueless when it comes to DC properties in the past when a filmmaker isn't leading the way, so I'm not sure what you're trying to argue here. There's nothing wrong with WB's position on the matter, obviously they were sitting on a huge IP and wanted to figure out how to maximize that. Thing is they're a very filmmaker driven studio. They seem to do better when they hire visionary filmmakers (which I am including Snyder under), let them do their thing and lead the way. When they start trying to handle this superhero stuff on an executive level it tends to either fizzle out or crash and burn.
As for me, I'm a solo Batman fan, and I guess a casual Superman fan over being a "DC" fan. I didn't grow up reading WW, GL, Flash, Aquaman, etc. I grew up on the Burton/Schumacher Batman films, Adam West series, the Timmverse, as well as Lois & Clark and the Donner Superman films (as well as the X-Men and Spidey animated series if you want to include Marvel). Didn't start reading comics until my teens, and at that point it was mostly Spider-Man and Batman books. I see nothing wrong with just liking certain characters rather than devoting a sworn allegiance to an entire brand. I'm also aware think these characters are only ever as good as the writer/artist/filmmaker that's working on them. Luckily Batman has attracted some of the best talent in every media. I guess you could vaguely say I'm a DC fan, as I do in theory like the angle of their characters being more god-like figures we can look up to, but I'd be a poser if I acted like I've been reading every DC book all my life.
Justice League Batman isn't something I've personally been dying to see, but I'd love to see the studio get this right because it could be something fresh and interesting. Unfortunately I have a tough time fully trusting Snyder, but his take on Batman seems great, and then there's Suicide Squad which looks amazing.