Consider a US based LLC with a buyout clause for a partner where the company is allowed to kick the partner out but if they do then they will have to pay him/her 30% of current year's profits. In this case, if the partner gets kicked out in 2017, he gets 30% of the profits for the year 2017. This is fine.
Now let's consider a similar buyout clause but which allows the partner an option to take the 30% of profits of a year 10 years from now. So that if the partner gets kicked out today in 2017, he/she is allowed to wait until 2027 when he receives 30% of the profits made in the year 2027.
Is this actually something that is legally allowed (that is, if the company doesn't pay the partner in 2027, will courts consider this buyout clause valid)? What happens if the company is restructured by then in ways so that this is no longer considered fair?