I hope to see new helicopters in Germany, Britain, Sweden and Japan. These are the few countries with helicopters and some of them are ineffective.
There is this thread which has some possible additions for Germany: German Helicopter Tech Tree - Current and Future Discussion Thread
There’s the MD 500 Defender Used by the US, Italy, Japan, Taiwan, Argentina and Israel
The McDonnell Douglas Helicopter Systems MD 500 Defender is a light multi-role helicopter based on the MD 500 light utility helicopter and OH-6 Cayuse Light Observation Helicopter.