I know Illumination has gotten a bad rep after the Despicable Me/Minions saturation, but it's actually a decent studio to make a Mario movie. The writing isn't always good, but their animation is smooth and colorful.
I'm not gonna gripe and complain too much, because honestly, it could be much worse. Sony (the minds behind the Emoji Movie) and Dreamworks haven't been doing so hot lately. At the very least, we can expect some quality animation, huge advertising campaigns, and the possibility of the Mario movie exceeding a gross profit of $500 million, much like many other movies created by Illumination.