Its impossible to say really, we have already seen small mods from ellis and BK such as the steering mods and using the CR rear end, the team and company will always be trying new things its just the part of evolution and im sure some of the things tried will be used and some discarded if there is to be a new car.
Like you say what direction could they go i cant see any of the current 4wd cars benefiting from a conversion kit, i think if there was a new car it would be another radical and cutting edge design. Personally i love my X5, i have never had a car go so well over bumps as well as being rapid in a straight line so even if i had to use it till 2010 i wouldn't mind as i cant think of a car i would rather drive right now
