Mattel doesn't own Captain Power, so I don't think they can incorporate that into NA (nor would I want them to, I want him to get his own relaunch)!
That said, if I could create a shared universe in which MOTU is just one of many just like the DC and Marvel-verses, I'd love for it to feature Bravestarr and Blackstar in other regions of space. Bravestarr even began as a spin off--although I really don't see Bravestarr looking good in MOTUC. The cowboys and barbarians thing would be a hard fit--although I guess I could see modern comics trying to make that work too. Back on Earth, if it's Captain Power and the Soldiers of the Future, I could dig that, although I think Bravestarr and Blackstar contradict that future. If I could expand beyond Filmation and Mattel I would include:
- Defenders of the Earth/Flash Gordon
- Dungeons and Dragons
- Pirates of Darkwater
- Galtar and the Golden Lances
- Galoob's Golden Girl (mixed in with She-Ra probably)
PS-how would Krusher be different from Whiplash? Is he a giant?