The plan is simple they will try to get people to adopt their coins instead of bitcoin and when we add that a coin owned by a government can be even more oppressive than the fiat system we have in place then it is easy to understand their motivations, but from our point of view it does not make sense to adopt those coins, but that is us, people with a decent amount of knowledge about the economy and bitcoin, but the rest of the people are not like us, so I expect in the future those coins to have decent success if they keep up the charade.
It seems to me that a great deal of people are storing their coins in exchanges and if at some point a law like that is passed then they're going to lose all their bitcoin, they will be incredibly mad about it but at that point there is nothing to be done, this is why if you're going to use exchanges you need to use them for what they are for, trade there and then immediately get your coins out of there.