I too am a bit torn on my opinion regarding the WWI arena. Especially when there's things like the KI-43, Yak-1/3 family and Pe-2 missing from the WWII planeset and many existing planes still to be updated to the AHII-standards. There's a lot to do there. I just hope that HTC doesn't devide their recources too thinly again. On the other hand, this will be something *totally* new, something that those WWII- workhorses I mentioned wouldn't really be for the vast majority of AH-players who spend all their playing time in the Main Arenas. It could be that Waffle and Superfly can from now on spend 95% of their time doing new aircraft, and if that is the case, four WWI aircraft doesn't sound *that* time consuming in the overall scheme of things. I'm of course just guessing, we'll have to wait and see.
My guess is that the three other fighters coming with the Dr.I are Fokker D.VII, Spad S.XIII and Sopwith Camel.
Btw, here's a pic of the Boeing Stearman made for the Red Baron-pizza promotion:
The model is of AHI -vintage.