Chapter 5 seems like it will be very awesome when it comes to BD. Lots of charcter development. Use of a number of previously dropped plotline that made it to the manga but were cut in 1974-75 due to ratings and the reductions of episodes. And a few large battles.
Plus the BIG battle should be near the start of Chapter 6, meaning they will be at least three episodes ahead of the original, giving them more room for plot as they get closer to Iscandar.
Well, you are right about that. I have seen the spoilers for 15-18 and let me tell you, it is a roller coaster ride. So without spoiling it for you all, I will say this, there are many mysteries along the way that ask more questions than answers. Also, someone is going to be assassinated. I will not say who since that will spoil the fun... hehe. As it is, ep 18 will have the dramatic shift in plot. That is all I am saying. Also, the the Bee planet shows up, but I will not spoil that either.