kamenriderghost:

New trademarks have been registered for Kamen Rider Ex-Aid, which point to the overall motif that the newest Kamen Rider will have. If the same pattern of registering the transformation device, weapon, and collectible is continued this year (which started with Ghost) then Kamen Rider Ex-Aid will transform using the Gamer Driver, his weapon will most likely be the Gashakon Breaker, and the Rider Gashut (ライダーガシャット Rider Gashatto) will probably be the collectibles.

Overall, this points to an arcade game / gashapon motif. If so, the gashapon motif would make him similar to Kamen Rider Birth who used a similar motif.