[NeonZ]

Here's the specific post

https://twitter.com/cron204/status/1194635946311831552

It's a weird post where he replied in Korean though, but a lot of people on Japanese twitter and 5ch reacted to it.

Shirakura is asked about his favorite Zi-O story and says that it's the upcoming winter movie that will feature Another Zero-One and Another #1
(as in, an Another Rider based on the original Rider). The other user then asks him if there's really an Another 1 and he wonders if it hadn't been officially revealed yet.

It's probably the suit from set pictures posted above, since it's clearly some kind of Rider 1 homage.