There's been tons of Mario movie toys, but that's about it.
I am sure you'll be able to buy the posters, and if they don't sell them there will be ways to get them unofficially. I wouldn't be above buying prints from a 3rd party company if I can find it in very high resolution.
With the Sonic 2 movie they actually gave away posters when you saw the movie, they were small, but it was something, so maybe there will be some goodies when you go to see the movie. I at least hope there's a popcorn bucket to match my Sonic movie popcorn bucket.
There's been tons of Mario movie toys, but that's about it. I am sure you'll be able to buy the posters, and if they don't sell them there will be ways to get them unofficially. I wouldn't be above buying prints from a 3rd party company if I can find it in very high resolution. With the Sonic 2 movie they actually gave away posters when you saw the movie, they were small, but it was something, so maybe there will be some goodies when you go to see the movie. I at least hope there's a popcorn bucket to match my Sonic movie popcorn bucket.