If the outcome of the FAA review deems Lithium-Ion batteries to be too hazardous for transport aircraft applications, then AB may also have a problem. L-Ion batteries are used to power emergency lighting on the A380 and AB also plans to use them on the A350.
Li-Ion battery's are the problem, its the mishandling by the 787's electrical system that caused the fire. This incident is a real concern because in indicates something relatively easy to prevent wasn't, so what else is fundamentally wrong? Overloading batteries, or anything else, is a serious issue with the much higher power levels in a 787 and it should have been impossible by design. Hence the review.