The tagline reads something in the line of "will the world within virtual reality save or will actual medical aid save?".
True ending or not I strongly believe that this whole movie will be about what is real.

Oh, certainly it will - but that doesn't change the fact that it's been explicitly stated to be the True Ending to the show.

Trailer for Ex-Aid Summer Movie but sadly in low quality video.

https://www.youtube.com/watch?v=p0I2WYoGf2I

I guess Fuuma is a nod to Kotaro Fuuma, actual ninja who existed during Feudal Japan and had his own clan named after him.

I don't know what's up with Ex-Aid's lower budget productions, but Seiji Takaiwa's suit acting is on point in these things. Seiji is very lively in things not to say that he isn't in the show, but he just feels so much more lively in these smaller productions.

Ex-Aid Muteki Gamer in Ganbarizing Game:

https://www.youtube.com/watch?v=3mnBOyTAeBg

Not sure if this is exactly the place for speculation, but it dawned on me there's a pretty big part of Ex-Aid's lore that the show hasn't addressed at all.

Namely, who does the rider compatibility surgeries? There doesn't seem to be any other CR employees that we don't know about, and Kuroto was able to have one done on himself without CR knowing.

Ex-Aid doesn't seem like the kind of show to just glance over something like that, so I wonder if that's gonna come up. I think the Snipe spin off is the most likely place, but I wouldn't be surprised if Fuuma ends up being the compatibility surgeon or something.

In the first episode of the Snipe special we see Asuna inducing some kind of treatment on Taiga. I imagine it's less of an open body operation and more of a slow controlled injection of antibodies.

I feel like the process being translated as "surgery" is a misnomer on some level, because as such would imply that the patient had an injury or disorder prior to being operated on.