Obviously each case is different, but friends of my parents (albeit a few years ago now) were in a similar position- long marriage, SAHM who did not enter back into the workforce even after children grew up and left home and self-employee husband- the divorce was not amicable and they spent a fortune in lawyers fees (TBH, I’d try and keep it amicable if at all possible, if they are anything to go by).
the judgement essentially split marital assets (house/cars/savings and any investments) equally. the wife did not get very much out of the value of the company due to the way it was set up- I’m not sure if that was deliberate or a bit of a fluke on his part. It did’t aware the pension on a 50/50 split. Essentially the judge took into account the years she was at home providing childcare, as this was allowing him to work without consideration of that responsibility. However, they did consider the time before and after that period a little differently and did not split that equally. As I said, they spent a lot of time and money getting there, though. I remember mum saying if either or both of them had compromised they would both have been better off in the end- what they saved/gained (depending on which side of the fence you look at) was spent on legal fees in a long, drawn out process.
i wound be very surprised if you had access to any future earnings, pension accrual after the split, or any future inheritances (apart from anything else, inheritances are not guaranteed, so how can you anticipate this or use it in any calculations).You would still get any legacy specifically left to you in the will of one of his relatives.
Joint investments, yet to mature, will be considered in the judgment, but I doubt you’ll get a lump sum from them now- unless, for instance, there is an agreement that you get x% more from a different investment/the house or savings and give up claim in the yet to mature investment. If not, you may get an order ensuring you get the allocated share on maturity. You would still get any legacy specifically left to you in the will of one of his relatives.
Get good legal advice, make sure you get what is fair- though I suppose that is subjective- but I’d be mindful that a long legal wrangle can be very expensive too and you could stand to lose more than you gain depending on the kind of figures you are talking about.