One area of consultancy that is thriving at the moment is HR.
I realise that most HR in most airlines is hardly strategic/dynamic, and some of it is so much like our UK Government - running a useless omni-shambles, but the experience of a recently redundant pilot might be relevant.
The downside is that a lot of the current work is firing people. But if you carefully researched the law and required processes when you were made redundant, you might already have something to offer a consultancy - even if, tactically, you are using it to get your foot in the door.
Naturally, lots of research is required, and maybe some counter-intuitive thinking - the smaller, local consultancies are where the growth is - the big multi-nationals are just shuffling staff around.