The IAG move for Norwegian is interesting. Clearly IAG fancy wiping out a dangerous competitor, access to a large fleet of modern aircraft and trained crews. Norwegian also opens up a weak area for IAG - Scandinavia.
Unlike some posters I don’t see Norwegian being folded into BA/EI and Vueling. I think it is more likely to be run as an IAG brand, like Niki was planned to be. Norwegian rewards might be replaced by Avios and some functions brought onto the IAG platforms. The exception I could see is the LEVEL operations, I think they could well be folded into Norwegian and the LGW operations would surely be refocused to compete less directly with BA.