i agree with both Graham and Jerzy.
the big box sets sold so well not only because of the subject,but also because the new and old figures were so good.
you have a very good and detailed range of normans,why not expand on it? the norman conquest of italy and sicily for example. the normans pretty much conquered the balkans before retreating back.the bretons of brittany had a go at the normans before 1066.
theres the battle of clontarf in ireland for expanding on the vikings figures.
Alfred the great was already mentioned as well.
too many new things to get into than to look for some sort of set of normans doing something or other.