The way I see it AH should be limited to units that were actually used in WWII. That leaves us with, so far as I know, four valid wonder weapons that have not yet been modeled. The first two are straightforward, the third and fourth are not. I should also clarify that I do not consider and prop plane a wonder weapon.
1) Meteor F.III
This is simply a fighter, powered by jet engines. It is Allied, armed with four Hispano Mk II 20mm cannon in the nose and had a top speed of 480mph. Though faster than prop fighters it is significantly slower than the Me262A-1. I'd think it would be about 100 to 150 perk points.
2) He162A-2 Salamander "Volksjager"
This is a light, German jet fighter powered by a single engine and armed with two MG151/20 cannon. It is reputed to be very manueverable and about the same speed as an Me262. I think this would also be in the 100 to 150 perk point range.
3) PC 1400 FX "Fritz X"
This was a German remotely guided, armor peircing bomb with a 1400kg warhead. It would require some way to guide it to it's target, both visually and to control it independantly of the aircraft. This weapon would also require the Do217, He111H-6 or He177A-5 to be modeled as a launching platform. I would suggest that a small perk price be added to the normally free bomber when the Fritz X bomb is selected, say 10 to 30 points, and those points are only recovered if the bomb hits a target.
4) MXY-7 Model 11 Ohka (Cherry Blossom) "Baka"
This was a Japanese suicide rocket bomb with a powered range of 23 miles and carrying a 1200kg warhead, dropped from a G4M2e "Betty" bomber. This would be the most contraversial unit. I think, though, that it would be interesting and difficult enough to use to make it balanced. It would require the addition of the G4M2 "Betty" as the delivery platform, a delivery platform that it so happens is very vulnerable.
The way I would see this working is the Betty pilot takes off, either in a single bomber or in a formation, paying a perk price for the Ohka or Ohkas (the Betty with a conventional bombload would be a freebie), setting the Ohka's price at 30 for the sake of arguement, of 30 for a single ship and 90 total for a formation. The Betty pilot would then need to get other players to join as Ohka pilots via a command like ".ohka Karnak". When the Betty pilot gets within range of his target he drops the Ohkas and tries to make it home. The Ohka pilots are then in gliding flight and may light off their engines and attempt to hit the target. The perk points are redeemed based on the Bettys returning to base, e.g. three Bettys take off costing 90 points but only one manages to straggle home means that 30 points are redeemed. Due to the lack of survivorablity of the Bettys I think this would be a fair system.
The other wonder weapons that I can think of are the V1, V2 and atomic bomb. I do not think that any of those would really add anything to AH and so do not consider them really valid. They are either random, take no skill or do too much damage for a single player.