I'm no mission maker, but a fully realized New Guinea campaign would get me flying offline, which as you know I don't do by and large.
The air war in New Guinea is one of the most overlooked, yet critically important campaigns in the entire Pacifc war. It was a grueling campaign that went on for 2 years or so. It tested the mettle of man and machine in a way that no 2 or 3 day carrier operation ever did, and it
gutted the Imperial Japanese Army Flying Corps. It robbed them of their best and most experienced pilots and crews. It saw the operational introduction of their first "modern" army fighter, the Ki-61, which forced the US Army to allocate P 38s to New Guinea instead of other areas where their long range was needed as well.
And from my personal interest perspective, it was in many ways the "shining hour" of P 40 operations in WW2. The Curtiss Hawks served from the beginning till the end of the New Guinea Campaign with the USAAF and the ANZAC air forces, first primarily as a fighter then later it's capabilities as a very competent fighter bomber shown through.
Also it would mean someone would have to make a P40 N model for the sim... Hint, hint.