Well, the legendary banner has finally been announced. It's not as good as I hoped. It never is. But it's alright and it includes Hardin. I missed NY Azura too so I will be pulling for her on here instead of Ninian on brides. It's unfortunate that the legendary units take up 1/3 of the banner. For me, they haven't been too hard to get at all; I'm only missing archer Lyn. I'll be draining my orbs on this one, and probably will be pulling all colors as well. It is tempting to pull just greens and blues but I'm missing four units total, including Ryoma.
Even if you have some of the focus units it's essentially a 2.67% rate for a particular focus character on a Legendary Banner, since there are no off-focus units. Even if there's four units you don't want, that means you're still pulling 5.33% on the ones you do. It's still a good ratio, and its a great return on investment for 5* in general.