They should work around it the way WXYZ does and just call it the "7-Day Forecast" or even sometimes just "7-Day". "First Alert 7-day Forecast Powered By Accuweather" is too much of a mouthful.
How well would "7 First Alert Weather" by itself work there? Or does it have to have ABC attached to it? Everything here in Detroit is branded as plain 7 despite the fact that there is an ABC logo on the circle 7. They supposedly did some research and found using ABC 7 would have confused the heck out of the viewers, who identified it as 7 first and ABC 2nd. I don't know how WLS's viewership sees the relationship between the network and WLS.
And before someone says I know WXYZ is not an O&O any longer but it is run as one because there are still some managers from the ABC days hanging on there and their new ND is from Bill Carey's O&O revival era from the early 2000's.