The thing about Toy Fair is... we only see the front half.
Plenty of deals are being made that don't involve anything we see upfront.
And things being shown don't necessarily equate to them ever existing.
Bandai at the end of the day will do what Saban tells them to, and if Saban isn't ready to discuss Season 2 of Fusion, no one is going to show stuff from it.
Toys not being shown at Toy Fair doesn't mean they don't exist, just as much as being shown as Toy Fair doesn't mean they'll end up being sold.
Voltron Force had an entire toyline shown at Toy Fair a few years ago, and I'm pretty sure not a single one of them ever came out.
Bandai was showing off a super gigantic classic Megazord a year or two back and that never came out.
All Star Rumble wasn't a massive game, but it's obvious they had been working on it for awhile and revealed it just a few months before release.
And of course, much of your post has nothing to do with anything. If Saban did decide to end Fusion... the amount of backlash would be... relatively nothing, nor would it have any affect on what may or may not happen with tri in the USA.
You underestimate the entertainment industries love of money.
They think Community could reach a wider audience and be made cheaper, they toss out it's creator. After a year they realize the new retooled show isn't working, they toss out the new guys and rehire the creator.
When Power Rangers was rebought by Saban, they put the people they wanted in charge, those guys wanted Judd to be a normal staff writer, he gave the polite industry version of 'piss off', the show was crap for 4 years. The people at Saban wanted to change the shows direction, they offer Judd the EP position, so now Judd is back to rangers.
Hell, Lorne Michaels wanted one year off, and SNL was supposed to go on hiatus. NBC changed their mind and nearly the entire cast and crew walked out the door with him. After a few years they cancelled the show. Then they went 'well... lets see if Lorne would be willing to come back...' and here we are 30 years later.
(My favorite story like this is Fox execs having security escort Bryan Singer off the Fox lot after he gave them news they didn't like, with threats of you'll never work with Fox again, etc... and then they had to let him back on a few hours later because he was directing a TV pilot for them.)
Never doubt the ability for entertainment companies that have established brands to make money.