Try to do something new, have a read around the current popular AARs, and then don't do anything like that.
The aim will be to grab the reader and keep him viewing, and if hes seen it done before, your less likely to get peoples interest.
So my advice would be go for a different layout, a different 'feel' and overall something that hasn't been done before in NTW AAR's, then your on to a winner.
Theres not much in way of a storyline that hasn't been done before, unless you want to completely make one up?
For instance, Liberation see's the writier freeing all of Europe from Napoleon.
The Great War will be looking at how it was in WW1, using the WW1 mod.
So perhaps base your AAR around a mod, and bring into a greater detail the aspects of this mod people won't have seen before.
But above all like I said, I think people look forward to seeing something 'new'.
Other than that, good luck my friend and I look forward to seeing what you come up with!