Just like any other movie, they will release merchandise to boost and hype the up coming movie.
Bandai will be releasing 2 Kamen Rider belts as a tie-in to the upcoming dream crossover movie “Kamen Rider × Super Sentai: Super Hero Taisen” this April.
The first one is the Kamen Rider Decade DX DecaDriver. The new version will include additional Final Attack Ride cards of the 10 Heisei Kamen Riders, printed in a new plastic. No new sound effects are confirmed as of writing. Personally i love Kamen Rider Decade because he got all the kamen rider power.
Last, but not the least, is the Kamen Rider W DX W-Driver. The new version is said to come with two new additional Gaia Memories, apart from the previously included Cyclone, Joker, Luna, and Heat Memories. The two new memories are not confirmed as of writing.
Both DX DecaDriver and W-Driver will be released this April 2012.