I don't think these Net Movie "cameos" or whatever are going to be anything more than use of footage or images from crossovers. There's that pic of Spider-Man with V3, and Ultraman vs. Kamen Rider. I bet this year's net movies are focusing on super hero crossovers that have happened in the past, and so Toei is obligated to give due credit to Tsuburaya and Marvel.

Not enough sad emotes in the world to describe how I feel.

Something occurred to me...would the Spiderman movie license affect Japanese Spiderman from appearing in one of these?

No it would not du to that a movie license not tv license due to we were still able to have a spidy cartoon on Disney also it based on a different character not Peter Parker as well so it still no

I just checked something. That copyright isn't to Marvel Comics. It's for Marvel Characters Inc, which is the company that licenses out the Marvel characters for media purposes. For that to be there, it means Toei has licensed a Marvel character. It could still just be old footage, but it seems likely that Spider-Man is going to show up.

Leopardon is the coolest.

Please be Toei Spider-Man, please be Toei Spider-Man...

Spider Man, Spider Man, Does whatever a Spider Man can...