Much as I want the P-61 (and I truly do), there are a ton of Luftwaffee, Soviet and Japanese aircraft I think need to be added to fill out those nation's plane sets. Currently, the US has the biggest Heavy, Medium and Light bomber collection, and the largest figher/attack collection. I love the US plane-set, but we do need planes from other countries. After the P-39, it would be nice to see things like the HE-111, the MiG-3 or I-16,and a few of those name Japanese fighters (never can remember them).