My headcanon is that arcade DK is modern DK. Cranky is his father or grandfather and DK Jr. is his son (who just hasn't had any adventures in a while).Go away with this blasphemy!
It's a way better theory than DK is Cranky's grandson, which makes DK Jr. an absent father who went missing or died. I say it fits both characters right especially Cranky.
This is a tangent, but speaking of DKR, I'd love a Hot Top Volcano or Spaceport Alpha stage in Smash.I want Hyrule Warriors 2 to become a reality. Maybe then Impa has an actual shot for a playable role in Smash one day.
Anyway, since we talking spin offs, what is a spin off title for DK that you'd like to see that hasn't been explored yet? I loved DKR and the Climber games, but Konga can stay away. Personally, a beat em up or a RPG game would be wonderful for DK I think.