That's pretty close what actually happened in the late 90's. Amiga Inc. approached the MorphOS developers to ask them about making their OS the new AmigaOS. They talked about it, got a contract they couldn't agree on and Amiga Inc. found Hyperion instead. So if things had been a little different, we would all have used MorphOS as AmigaOS today. Makes you think, doesn't it 
Absolutely, many whine about being 3 NG OS's. Well this is what happened and there's no going back, maybe the biggest reason we ended up in this mess is Hyperion so maybe they deserve a bankruptcy after all these years, you can't honestly say they've run their business with success. If they stayed away maybe the real AmigaOS that became MorphOS could have come to an agreement at a later negotiations and we wouldn't even know of this split.
Less and less people buy into OS4 and when asked for reasons why they blame it on the other NG OS'es but fail to see that in year 2015 people can't justify 3000 euros for average computer hardware so the user base can only shrink. It has became a rich mans hobby.