well there is a r/b dragonswarm who will get support. so its not so far fetched, that r/b could become viable.It certainly doesn't hurt to pick them up since I'm assuming they're cheap, but we currently have no reason to suspect RB will be viable, and 3 Sarkhan's will be more than acceptable once SBD is gone. Lastly, we have an entire set based on dragons coming out next month to add more competition.
i picked 4 of them for 15cents each up too. you cant go wrong with that.