Dawson Casting: Not a single actor whose age is known is an actual teenager; Ciara Hanna (Gia) and John Loudermilk (Noah) are 21, Andrew Gray (Troy) is 25, and Christina Masterson (Emma) is 23 (though some sources state that she's 29). Azim Rizk's (Jake) age is 23, but he's the only one who looks like he could pass for a teenager.
When referring to the massive battle from Troy's dreams, fans commonly use the Gokaiger name for it, the "Legend War".
"Mega War" is becoming quite popular too now as a reference to the show's name (the fact that JDF referred to it as such may have something to do with it).
RoboCop Knight for the Robo-Knight due to having similar voices and mannerisms.
"Cameo Rangers" for the group of actors that came back to, at the very least, show up during part of the Mega War.
Some fans referred Super Megaforce as "Goseikaiger".
Some fans refer to the currently unnamed Dairanger mode as "Bring-on-the-new-powers Rangers"
Power Rangers Star Force in quite common as well, since the name was used in a casting side whose script very closely resembled the Dairanger tribute episode of Gokaiger.
Hey, It's That Voice!: Geoffrey Dolan, the voice of Gosei, was also the voices of Koragg and Dai Shi, while Campbell Cooley, the voice of Admiral Malkor, was the voice of Alpha 6 in "Once a Ranger" as well as several monsters in previous seasons.
Romance on the Set: It has become clear that this is the case for Ciara Hanna and Jason Smith, who will reprise his role as Casey, the Jungle Fury Red Ranger during the filming of the Super Megaforce half of the season. Just look at Ciara's Instagram, Twitter and especially Facebook.
Take this with a grain of salt, some sources claim that Ciara has a boyfriend back in the States and the closeness between her and Jason could be explained as them bonding over being rangers and that they happen to share the same animal: the tiger.
Schedule Slip: The tenth episode was scheduled to air on May 18th of 2013, but was pushed back to an unknown date for equally unknown reasons. It wasn't until mid-August that a new airdate of September 7th was announced.
And in the UK, Megaforce's premiere on Nickelodeon was delayed so much that it still hasn't started, and now Channel Five is going to be doing the UK premiere instead. Again, the reason why Nick let this happen is unknown.
What Could Have Been: Many fans have been utterly vocal over the fact that a number of former Rangers are not coming back for Super Megaforce, mostly due to the fact that they weren't asked or they declined the invitation. Among those who aren't coming back are David Yost (declined because of how he felt the invitation was an insult), Steve Cardenas (declined due to the low pay for the brief cameo, which is a reason many others declined), Rhett Fisher (invited, then uninvited due to budget constraints), and almost everyone from the Disney-era (most of them were never tapped,) and others still were adamant about saying their issue wasn't specifically money, but other extenuating circumstances (Valerie Vernon wanted to do it, but now has children and wasn't given enough time to prepare arrangements to allow her to make the trip to New Zealand. Erin Cahill also wanted to return, but had to refuse because Rangers is a non-union production and she is currently a SAG-member.)
It's been rumored that Saban wanted to skip adapting Goseiger and go straight to Gokaiger for the 20th anniversary, but Executive Meddling prevented that.