[ArmadaPrime]

Tridoron looks pretty sweet though I feel the helmet could maybe be a bit less angular.

Regarding the (incredibly awesome) double-sided shift car and the Tridoron key, my guess for what this means for the summer movie is something vaguely like: Someone comes from the future, steals the drive driver, and uses Type Next; Shinnouske has to borrow a mach driver and uses the key to becomes Super Deadheat (It seems to be a chase/drive mix but the spoiler, use of the key and the fact the sillhouette is red implies to me that it'll be drive using it); Shin eventually gets the drive driver and shift next special back from the person who stole it, and becomes Type Special, as a “good” version of Type Next (note the similar shoulderpads and arms in the sillhouette, just the head looks different from what we can see)

As for the last mystery item, I’m expecting it to be a new weapon for either Next/Special or possible Super Deadheat. I think four movie-exclusive forms might be a bit of a stretch somehow

Pretty excited for when more details eventually drop on these!