Will 2017 be too much for Bandai America?
 

Next year is probably going to be hell for Bandai America. They will be releasing and promoting Power Rangers Ninja Steel toys, they have the Legacy line which by that time we'll see (possible) Alien Rangers and (confirmed) Ninja Storm figures, a Legacy Ninja Megazord, a (possible) Legacy Ninja Storm Megazord, and a toy line to promote the Power Rangers film. Is Bandai putting too many of their eggs in one basket?

No, just look at how many lines Lego and Hasbro have going on. Bandai would not be having multiple lines if they couldn't do it. Really if they cut a little off of Ninja Steel (number of figures, repaints, etc.) they will have plenty shelf space.

Now if only their distribution wasn't a fucking mess.

More like more money for them.

But what if they don't sell? What if the movie bombs, the new season sucks, and the Legacy line cost too much to make up for the losses of the other two lines?

The movie and season's quality are irrelevant. They'll only really care if the toy sales are noticeably low. That's when things will scare them.
The movie could be at 4% ratings and the season could be at an all time low for PR, but if the toy sales stay up (And they will. PR is giant right now), then it'll be a plus in their book.

Really, the biggest fears for them right now is that they may have put too much into the Legacy line, which is clearly aimed at adults with their higher prices. That might come back to bite them if the adult fans aren't too in love with the figures (Which plebians like us can't even see) and the kids aren't too into them due to being $20 a pop.
Add in the inevitable Black and Gold Thunder Megazord and Tigerzord that'll be pushed out at the same time, and the Legacy line might end up sitting a little still for 2017.

Even if the Power Rangers 2017 film gets awful review, I think it will do well at the box office and sell a good amount of toys like the 2014 TMNT film did. That awful got bad reviews from critics and fans, but still did well.

That's what I am afraid of. I like the Legacy line and I'd hate for it to go away. I noticed that future releases seem to be getting rid of zord builder. I want to encourage that. I don't want to be left with crappy Bandai America zord builder shit.

Legacy just needs to drop the Diecast and take that funding into adding articulation to the Megazord. Give the Ninja Megazord elbows, universal shoulders working knees, hips and ankle joints.

That would be worth the cost unlike gratuitous use of metal that just makes for heavy product.

Oh man, an articulated Ninja Megazord would be beautiful~
The frog already has knees! Just enhance them some and give the wolf and ape elbows!
A wrist swivel would be easy (Since the hands are just gloves you pop onto the mech).

The Ninja Megazord would be such an easy place to add articulation without too many redesign worries.